Base | Representation |
---|---|
bin | 1001010000101… |
… | …0111001001010 |
3 | 2201002101010000 |
4 | 2110022321022 |
5 | 34420420210 |
6 | 3504303430 |
7 | 651102531 |
oct | 224127112 |
9 | 81071100 |
10 | 38841930 |
11 | 1aa1a576 |
12 | 11011b76 |
13 | 807c6ba |
14 | 5231318 |
15 | 3623ac0 |
hex | 250ae4a |
38841930 has 80 divisors (see below), whose sum is σ = 105937920. Its totient is φ = 10209888.
The previous prime is 38841919. The next prime is 38841937. The reversal of 38841930 is 3914883.
It is a super-2 number, since 2×388419302 = 3017391052249800, which contains 22 as substring.
It is not an unprimeable number, because it can be changed into a prime (38841937) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 63687 + ... + 64293.
It is an arithmetic number, because the mean of its divisors is an integer number (1324224).
Almost surely, 238841930 is an apocalyptic number.
38841930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 38841930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52968960).
38841930 is an abundant number, since it is smaller than the sum of its proper divisors (67095990).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
38841930 is a wasteful number, since it uses less digits than its factorization.
38841930 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 705 (or 696 counting only the distinct ones).
The product of its (nonzero) digits is 20736, while the sum is 36.
The square root of 38841930 is about 6232.3294200483. The cubic root of 38841930 is about 338.6623625547.
The spelling of 38841930 in words is "thirty-eight million, eight hundred forty-one thousand, nine hundred thirty".
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