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38912988 = 223191031657
BaseRepresentation
bin1001010001110…
…0001111011100
32201012222120210
42110130033130
534430203423
63510012420
7651516642
oct224341734
981188523
1038912988
111aa689a4
1211047110
1380a5b4a
14524d192
153639b93
hex251c3dc

38912988 has 48 divisors (see below), whose sum is σ = 96561920. Its totient is φ = 12161664.

The previous prime is 38912981. The next prime is 38913001. The reversal of 38912988 is 88921983.

It is a happy number.

38912988 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38912981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22656 + ... + 24312.

Almost surely, 238912988 is an apocalyptic number.

38912988 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 38912988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48280960).

38912988 is an abundant number, since it is smaller than the sum of its proper divisors (57648932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38912988 is a wasteful number, since it uses less digits than its factorization.

With its successor (38912989) it forms an eRAP, since the sums of their prime factors are consecutive (1786 and 1787).

38912988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1784 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 38912988 is about 6238.0275728791. The cubic root of 38912988 is about 338.8687547217.

The spelling of 38912988 in words is "thirty-eight million, nine hundred twelve thousand, nine hundred eighty-eight".

Divisors: 1 2 3 4 6 12 19 38 57 76 103 114 206 228 309 412 618 1236 1657 1957 3314 3914 4971 5871 6628 7828 9942 11742 19884 23484 31483 62966 94449 125932 170671 188898 341342 377796 512013 682684 1024026 2048052 3242749 6485498 9728247 12970996 19456494 38912988