38857864 has 8 divisors (see below), whose sum is σ = 72858510. Its totient is φ = 19428928.

The previous prime is 38857843. The next prime is 38857891. The reversal of 38857864 is 46875883.

It can be written as a sum of positive squares in only one way, i.e., 38564100 + 293764 = 6210^2 + 542^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2428609 + ... + 2428624.

Almost surely, 2^38857864 is an apocalyptic number.

It is an amenable number.

38857864 is a deficient number, since it is larger than the sum of its proper divisors (34000646).

38857864 is a wasteful number, since it uses less digits than its factorization.

38857864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857239 (or 4857235 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 49.

The square root of 38857864 is about 6233.6076231986. The cubic root of 38857864 is about 338.7086656809.

The spelling of 38857864 in words is "thirty-eight million, eight hundred fifty-seven thousand, eight hundred sixty-four".