38815820 has 24 divisors (see below), whose sum is σ = 81648000. Its totient is φ = 15500672.

The previous prime is 38815817. The next prime is 38815867. The reversal of 38815820 is 2851883.

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, 14981 + ... + 17379.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^38815820 is an apocalyptic number.

It is an amenable number.

38815820 is an abundant number, since it is smaller than the sum of its proper divisors (42832180).

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

38815820 is a wasteful number, since it uses less digits than its factorization.

38815820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3217 (or 3215 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 38815820 is about 6230.2343455122. The cubic root of 38815820 is about 338.5864612769.

The spelling of 38815820 in words is "thirty-eight million, eight hundred fifteen thousand, eight hundred twenty".