38687129440 has 24 divisors (see below), whose sum is σ = 91398343680. Its totient is φ = 15474851712.

The previous prime is 38687129423. The next prime is 38687129479. The reversal of 38687129440 is 4492178683.

38687129440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 120897120 + ... + 120897439.

It is an arithmetic number, because the mean of its divisors is an integer number (3808264320).

Almost surely, 2^38687129440 is an apocalyptic number.

It is an amenable number.

38687129440 is an abundant number, since it is smaller than the sum of its proper divisors (52711214240).

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

38687129440 is a wasteful number, since it uses less digits than its factorization.

38687129440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241794574 (or 241794566 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 38687129440 in words is "thirty-eight billion, six hundred eighty-seven million, one hundred twenty-nine thousand, four hundred forty".