139538274 has 16 divisors (see below), whose sum is σ = 279858240. Its totient is φ = 46382480.

The previous prime is 139538257. The next prime is 139538279. The reversal of 139538274 is 472835931.

It is not an unprimeable number, because it can be changed into a prime (139538279) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30237 + ... + 34544.

It is an arithmetic number, because the mean of its divisors is an integer number (17491140).

Almost surely, 2^139538274 is an apocalyptic number.

139538274 is an abundant number, since it is smaller than the sum of its proper divisors (140319966).

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

139538274 is a wasteful number, since it uses less digits than its factorization.

139538274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65145.

The product of its digits is 181440, while the sum is 42.

The square root of 139538274 is about 11812.6319675168. The cubic root of 139538274 is about 518.6779458832.

The spelling of 139538274 in words is "one hundred thirty-nine million, five hundred thirty-eight thousand, two hundred seventy-four".