38402870 has 64 divisors (see below), whose sum is σ = 80745984. Its totient is φ = 13009920.

The previous prime is 38402849. The next prime is 38402879. The reversal of 38402870 is 7820483.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38402879) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108614 + ... + 108966.

It is an arithmetic number, because the mean of its divisors is an integer number (1261656).

Almost surely, 2^38402870 is an apocalyptic number.

38402870 is the 5060-th pentagonal number.

38402870 is an abundant number, since it is smaller than the sum of its proper divisors (42343114).

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

38402870 is a wasteful number, since it uses less digits than its factorization.

38402870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437.

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 38402870 is about 6197.0049217344. The cubic root of 38402870 is about 337.3814709521.

The spelling of 38402870 in words is "thirty-eight million, four hundred two thousand, eight hundred seventy".