139865904 has 30 divisors (see below), whose sum is σ = 391430676. Its totient is φ = 46621920.

The previous prime is 139865867. The next prime is 139865909. The reversal of 139865904 is 409568931.

It is a happy number.

It is a super-2 number, since 2×139865904² = 39124942203474432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 139865904.

It is not an unprimeable number, because it can be changed into a prime (139865909) 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, 485502 + ... + 485789.

Almost surely, 2^139865904 is an apocalyptic number.

It is an amenable number.

139865904 is an abundant number, since it is smaller than the sum of its proper divisors (251564772).

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

139865904 is a wasteful number, since it uses less digits than its factorization.

139865904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971305 (or 971296 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 139865904 is about 11826.4916183964. The cubic root of 139865904 is about 519.0835732525.

The spelling of 139865904 in words is "one hundred thirty-nine million, eight hundred sixty-five thousand, nine hundred four".