139385664 has 112 divisors (see below), whose sum is σ = 447080640. Its totient is φ = 42232320.

The previous prime is 139385663. The next prime is 139385683. The reversal of 139385664 is 466583931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139385663) 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, 15342 + ... + 22674.

Almost surely, 2^139385664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139385664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223540320).

139385664 is an abundant number, since it is smaller than the sum of its proper divisors (307694976).

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

139385664 is a wasteful number, since it uses less digits than its factorization.

139385664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7365 (or 7349 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 139385664 is about 11806.1705899923. The cubic root of 139385664 is about 518.4887879472.

The spelling of 139385664 in words is "one hundred thirty-nine million, three hundred eighty-five thousand, six hundred sixty-four".