38668928 has 32 divisors (see below), whose sum is σ = 77359860. Its totient is φ = 19253248.

The previous prime is 38668907. The next prime is 38668951. The reversal of 38668928 is 82986683.

It can be written as a sum of positive squares in 2 ways, for example, as 34951744 + 3717184 = 5912^2 + 1928^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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, 40100 + ... + 41052.

Almost surely, 2^38668928 is an apocalyptic number.

It is an amenable number.

38668928 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

38668928 is an equidigital number, since it uses as much as digits as its factorization.

38668928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1284 (or 1272 counting only the distinct ones).

The product of its digits is 995328, while the sum is 50.

The square root of 38668928 is about 6218.4345296867. The cubic root of 38668928 is about 338.1588133621.

The spelling of 38668928 in words is "thirty-eight million, six hundred sixty-eight thousand, nine hundred twenty-eight".