139505268 has 48 divisors (see below), whose sum is σ = 372753920. Its totient is φ = 39779424.

The previous prime is 139505257. The next prime is 139505269. The reversal of 139505268 is 862505931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139505269) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50655 + ... + 53337.

Almost surely, 2^139505268 is an apocalyptic number.

It is an amenable number.

139505268 is an abundant number, since it is smaller than the sum of its proper divisors (233248652).

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

139505268 is a wasteful number, since it uses less digits than its factorization.

139505268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3316 (or 3314 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 39.

The square root of 139505268 is about 11811.2348211353. The cubic root of 139505268 is about 518.6370471062.

The spelling of 139505268 in words is "one hundred thirty-nine million, five hundred five thousand, two hundred sixty-eight".