38939816 has 32 divisors (see below), whose sum is σ = 77246400. Its totient is φ = 18351360.

The previous prime is 38939767. The next prime is 38939821. The reversal of 38939816 is 61893983.

It is a super-2 number, since 2×38939816² = 3032618540227712, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36101 + ... + 37163.

It is an arithmetic number, because the mean of its divisors is an integer number (2413950).

Almost surely, 2^38939816 is an apocalyptic number.

It is an amenable number.

38939816 is a deficient number, since it is larger than the sum of its proper divisors (38306584).

38939816 is a wasteful number, since it uses less digits than its factorization.

38939816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1325 counting only the distinct ones).

The product of its digits is 279936, while the sum is 47.

The square root of 38939816 is about 6240.1775615763. The cubic root of 38939816 is about 338.9466128950.

The spelling of 38939816 in words is "thirty-eight million, nine hundred thirty-nine thousand, eight hundred sixteen".