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38888885 = 572394649
BaseRepresentation
bin1001010001011…
…0010110110101
32201011202112002
42110112112311
534423421020
63505305045
7651356450
oct224262665
981152462
1038888885
111aa51882
1211035185
138097b99
145244497
153632975
hex25165b5

38888885 has 16 divisors (see below), whose sum is σ = 53568000. Its totient is φ = 26549376.

The previous prime is 38888879. The next prime is 38888891. The reversal of 38888885 is 58888883.

38888885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (38888879) and next prime (38888891).

It is not a de Polignac number, because 38888885 - 216 = 38823349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 38888885.

It is a congruent number.

It is an unprimeable number.

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, 6041 + ... + 10689.

It is an arithmetic number, because the mean of its divisors is an integer number (3348000).

Almost surely, 238888885 is an apocalyptic number.

38888885 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

38888885 is a deficient number, since it is larger than the sum of its proper divisors (14679115).

38888885 is a wasteful number, since it uses less digits than its factorization.

38888885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900.

The product of its digits is 3932160, while the sum is 56.

The square root of 38888885 is about 6236.0953328184. The cubic root of 38888885 is about 338.7987743117.

It can be divided in two parts, 3 and 8888885, that added together give a palindrome (8888888).

The spelling of 38888885 in words is "thirty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-five".

Divisors: 1 5 7 35 239 1195 1673 4649 8365 23245 32543 162715 1111111 5555555 7777777 38888885