139278264 has 32 divisors (see below), whose sum is σ = 352608000. Its totient is φ = 45837792.

The previous prime is 139278253. The next prime is 139278277. The reversal of 139278264 is 462872931.

139278264 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 7 ways as a sum of consecutive naturals, for example, 34834 + ... + 38625.

It is an arithmetic number, because the mean of its divisors is an integer number (11019000).

Almost surely, 2^139278264 is an apocalyptic number.

It is an amenable number.

139278264 is an abundant number, since it is smaller than the sum of its proper divisors (213329736).

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

139278264 is a wasteful number, since it uses less digits than its factorization.

139278264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73547 (or 73543 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 139278264 is about 11801.6212445579. The cubic root of 139278264 is about 518.3555843767.

The spelling of 139278264 in words is "one hundred thirty-nine million, two hundred seventy-eight thousand, two hundred sixty-four".