38642790 has 32 divisors (see below), whose sum is σ = 95942880. Its totient is φ = 9949184.

The previous prime is 38642759. The next prime is 38642803. The reversal of 38642790 is 9724683.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21339 + ... + 23078.

It is an arithmetic number, because the mean of its divisors is an integer number (2998215).

Almost surely, 2^38642790 is an apocalyptic number.

38642790 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

38642790 is an abundant number, since it is smaller than the sum of its proper divisors (57300090).

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

38642790 is a wasteful number, since it uses less digits than its factorization.

38642790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44456.

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 38642790 is about 6216.3325200636. The cubic root of 38642790 is about 338.0826041352.

The spelling of 38642790 in words is "thirty-eight million, six hundred forty-two thousand, seven hundred ninety".