38778928 has 20 divisors (see below), whose sum is σ = 76042008. Its totient is φ = 19155200.

The previous prime is 38778917. The next prime is 38778941. The reversal of 38778928 is 82987783.

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, 13273 + ... + 15928.

Almost surely, 2^38778928 is an apocalyptic number.

It is an amenable number.

38778928 is a deficient number, since it is larger than the sum of its proper divisors (37263080).

38778928 is a wasteful number, since it uses less digits than its factorization.

38778928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29292 (or 29286 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 52.

The square root of 38778928 is about 6227.2729183809. The cubic root of 38778928 is about 338.4791588835.

The spelling of 38778928 in words is "thirty-eight million, seven hundred seventy-eight thousand, nine hundred twenty-eight".