38999870 has 64 divisors (see below), whose sum is σ = 91518336. Its totient is φ = 11612160.

The previous prime is 38999861. The next prime is 38999903. The reversal of 38999870 is 7899983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14210 + ... + 16730.

It is an arithmetic number, because the mean of its divisors is an integer number (1429974).

Almost surely, 2^38999870 is an apocalyptic number.

38999870 is an abundant number, since it is smaller than the sum of its proper divisors (52518466).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38999870 is a wasteful number, since it uses less digits than its factorization.

38999870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565.

The product of its (nonzero) digits is 979776, while the sum is 53.

The square root of 38999870 is about 6244.9875900597. The cubic root of 38999870 is about 339.1207674997.

The spelling of 38999870 in words is "thirty-eight million, nine hundred ninety-nine thousand, eight hundred seventy".