139878364 has 12 divisors (see below), whose sum is σ = 255430224. Its totient is φ = 66898304.

The previous prime is 139878359. The next prime is 139878371. The reversal of 139878364 is 463878931.

It is a happy number.

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, 760117 + ... + 760300.

It is an arithmetic number, because the mean of its divisors is an integer number (21285852).

Almost surely, 2^139878364 is an apocalyptic number.

It is an amenable number.

139878364 is a deficient number, since it is larger than the sum of its proper divisors (115551860).

139878364 is a wasteful number, since it uses less digits than its factorization.

139878364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1520444 (or 1520442 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 139878364 is about 11827.0183901100. The cubic root of 139878364 is about 519.0989870383.

The spelling of 139878364 in words is "one hundred thirty-nine million, eight hundred seventy-eight thousand, three hundred sixty-four".