38815992 has 24 divisors (see below), whose sum is σ = 105126840. Its totient is φ = 12938640.

The previous prime is 38815991. The next prime is 38816003. The reversal of 38815992 is 29951883.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38815991) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 269484 + ... + 269627.

It is an arithmetic number, because the mean of its divisors is an integer number (4380285).

Almost surely, 2^38815992 is an apocalyptic number.

It is an amenable number.

38815992 is an abundant number, since it is smaller than the sum of its proper divisors (66310848).

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

38815992 is a wasteful number, since it uses less digits than its factorization.

38815992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539123 (or 539116 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 38815992 is about 6230.2481491510. The cubic root of 38815992 is about 338.5869613890.

The spelling of 38815992 in words is "thirty-eight million, eight hundred fifteen thousand, nine hundred ninety-two".