139138720 has 48 divisors (see below), whose sum is σ = 375677568. Its totient is φ = 47704320.

The previous prime is 139138709. The next prime is 139138721. The reversal of 139138720 is 27831931.

It is not an unprimeable number, because it can be changed into a prime (139138721) 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, 60996 + ... + 63235.

It is an arithmetic number, because the mean of its divisors is an integer number (7826616).

Almost surely, 2^139138720 is an apocalyptic number.

139138720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139138720 is an abundant number, since it is smaller than the sum of its proper divisors (236538848).

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

139138720 is a wasteful number, since it uses less digits than its factorization.

139138720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124253 (or 124245 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 139138720 is about 11795.7076939029. The cubic root of 139138720 is about 518.1824116691.

The spelling of 139138720 in words is "one hundred thirty-nine million, one hundred thirty-eight thousand, seven hundred twenty".