139136704 has 56 divisors (see below), whose sum is σ = 334121760. Its totient is φ = 56119296.

The previous prime is 139136681. The next prime is 139136707. The reversal of 139136704 is 407631931.

It is a tau number, because it is divible by the number of its divisors (56).

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a self number, because there is not a number n which added to its sum of digits gives 139136704.

It is not an unprimeable number, because it can be changed into a prime (139136707) 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, 1519 + ... + 16750.

It is an arithmetic number, because the mean of its divisors is an integer number (5966460).

Almost surely, 2^139136704 is an apocalyptic number.

139136704 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139136704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167060880).

139136704 is an abundant number, since it is smaller than the sum of its proper divisors (194985056).

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

139136704 is a wasteful number, since it uses less digits than its factorization.

139136704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18305 (or 18295 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 139136704 is about 11795.6222387799. The cubic root of 139136704 is about 518.1799089850.

The spelling of 139136704 in words is "one hundred thirty-nine million, one hundred thirty-six thousand, seven hundred four".