139979268 has 72 divisors (see below), whose sum is σ = 415711296. Its totient is φ = 39153600.

The previous prime is 139979267. The next prime is 139979293. The reversal of 139979268 is 862979931.

It is not an unprimeable number, because it can be changed into a prime (139979263) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8448 + ... + 18743.

It is an arithmetic number, because the mean of its divisors is an integer number (5773768).

Almost surely, 2^139979268 is an apocalyptic number.

139979268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

139979268 is an abundant number, since it is smaller than the sum of its proper divisors (275732028).

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

139979268 is a wasteful number, since it uses less digits than its factorization.

139979268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27225 (or 27220 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 139979268 is about 11831.2834468624. The cubic root of 139979268 is about 519.2237777799.

It can be divided in two parts, 13 and 9979268, that added together give a square (9979281 = 3159²).

The spelling of 139979268 in words is "one hundred thirty-nine million, nine hundred seventy-nine thousand, two hundred sixty-eight".