139085904 has 40 divisors (see below), whose sum is σ = 359932320. Its totient is φ = 46281088.

The previous prime is 139085897. The next prime is 139085911. The reversal of 139085904 is 409580931.

It is an interprime number because it is at equal distance from previous prime (139085897) and next prime (139085911).

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, 29434 + ... + 33830.

It is an arithmetic number, because the mean of its divisors is an integer number (8998308).

Almost surely, 2^139085904 is an apocalyptic number.

It is an amenable number.

139085904 is an abundant number, since it is smaller than the sum of its proper divisors (220846416).

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

139085904 is a wasteful number, since it uses less digits than its factorization.

139085904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5067 (or 5061 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 139085904 is about 11793.4687009378. The cubic root of 139085904 is about 518.1168373370.

The spelling of 139085904 in words is "one hundred thirty-nine million, eighty-five thousand, nine hundred four".