139088664 has 320 divisors, whose sum is σ = 487872000. Its totient is φ = 36391680.

The previous prime is 139088641. The next prime is 139088689. The reversal of 139088664 is 466880931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1760577 + ... + 1760655.

It is an arithmetic number, because the mean of its divisors is an integer number (1524600).

Almost surely, 2^139088664 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 139088664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243936000).

139088664 is an abundant number, since it is smaller than the sum of its proper divisors (348783336).

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

139088664 is a wasteful number, since it uses less digits than its factorization.

139088664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 139088664 is about 11793.5857142771. The cubic root of 139088664 is about 518.1202644588.

The spelling of 139088664 in words is "one hundred thirty-nine million, eighty-eight thousand, six hundred sixty-four".