139978592 has 96 divisors (see below), whose sum is σ = 315614880. Its totient is φ = 60641280.

The previous prime is 139978583. The next prime is 139978603. The reversal of 139978592 is 295879931.

139978592 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 15 ways as a sum of consecutive naturals, for example, 494483 + ... + 494765.

It is an arithmetic number, because the mean of its divisors is an integer number (3287655).

Almost surely, 2^139978592 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139978592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157807440).

139978592 is an abundant number, since it is smaller than the sum of its proper divisors (175636288).

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

139978592 is a wasteful number, since it uses less digits than its factorization.

139978592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 368 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 53.

The square root of 139978592 is about 11831.2548784987. The cubic root of 139978592 is about 519.2229419517. Note that the first 3 decimals are identical.

The spelling of 139978592 in words is "one hundred thirty-nine million, nine hundred seventy-eight thousand, five hundred ninety-two".