38137840 has 40 divisors (see below), whose sum is σ = 95493888. Its totient is φ = 14081280.

The previous prime is 38137837. The next prime is 38137859. The reversal of 38137840 is 4873183.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 38137796 and 38137805.

It is a congruent number.

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, 17296 + ... + 19375.

Almost surely, 2^38137840 is an apocalyptic number.

It is an amenable number.

38137840 is an abundant number, since it is smaller than the sum of its proper divisors (57356048).

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

38137840 is a wasteful number, since it uses less digits than its factorization.

38137840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36697 (or 36691 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 38137840 is about 6175.5841828931. The cubic root of 38137840 is about 336.6035542687.

The spelling of 38137840 in words is "thirty-eight million, one hundred thirty-seven thousand, eight hundred forty".