139516428 has 12 divisors (see below), whose sum is σ = 325538360. Its totient is φ = 46505472.

The previous prime is 139516417. The next prime is 139516499. The reversal of 139516428 is 824615931.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 5813173 + ... + 5813196.

Almost surely, 2^139516428 is an apocalyptic number.

It is an amenable number.

139516428 is an abundant number, since it is smaller than the sum of its proper divisors (186021932).

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

139516428 is a wasteful number, since it uses less digits than its factorization.

139516428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626376 (or 11626374 counting only the distinct ones).

The product of its digits is 51840, while the sum is 39.

The square root of 139516428 is about 11811.7072432396. The cubic root of 139516428 is about 518.6508765364.

The spelling of 139516428 in words is "one hundred thirty-nine million, five hundred sixteen thousand, four hundred twenty-eight".