38137990 has 48 divisors (see below), whose sum is σ = 77316624. Its totient is φ = 13527360.

The previous prime is 38137951. The next prime is 38137999. The reversal of 38137990 is 9973183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38137999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51664 + ... + 52396.

It is an arithmetic number, because the mean of its divisors is an integer number (1610763).

Almost surely, 2^38137990 is an apocalyptic number.

38137990 is an abundant number, since it is smaller than the sum of its proper divisors (39178634).

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

38137990 is a wasteful number, since it uses less digits than its factorization.

38137990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 38137990 is about 6175.5963274813. The cubic root of 38137990 is about 336.6039955668.

The spelling of 38137990 in words is "thirty-eight million, one hundred thirty-seven thousand, nine hundred ninety".