38690865 has 40 divisors (see below), whose sum is σ = 70253568. Its totient is φ = 20368800.

The previous prime is 38690851. The next prime is 38690887. The reversal of 38690865 is 56809683.

It is not a de Polignac number, because 38690865 - 2⁴ = 38690849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 38690865.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 33040 + ... + 34190.

Almost surely, 2^38690865 is an apocalyptic number.

It is an amenable number.

38690865 is a deficient number, since it is larger than the sum of its proper divisors (31562703).

38690865 is a wasteful number, since it uses less digits than its factorization.

38690865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251 (or 1242 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 38690865 is about 6220.1981479692. The cubic root of 38690865 is about 338.2227474467. Note that the first 3 decimals are identical.

The spelling of 38690865 in words is "thirty-eight million, six hundred ninety thousand, eight hundred sixty-five".