38913728 has 28 divisors (see below), whose sum is σ = 88251792. Its totient is φ = 16677120.

The previous prime is 38913683. The next prime is 38913739. The reversal of 38913728 is 82731983.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42983 + ... + 43878.

Almost surely, 2^38913728 is an apocalyptic number.

It is an amenable number.

38913728 is an abundant number, since it is smaller than the sum of its proper divisors (49338064).

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

38913728 is an equidigital number, since it uses as much as digits as its factorization.

38913728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86880 (or 86870 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 38913728 is about 6238.0868862176. The cubic root of 38913728 is about 338.8709027730.

The spelling of 38913728 in words is "thirty-eight million, nine hundred thirteen thousand, seven hundred twenty-eight".