139090720 has 24 divisors (see below), whose sum is σ = 328602204. Its totient is φ = 55636224.

The previous prime is 139090703. The next prime is 139090741. The reversal of 139090720 is 27090931.

It can be written as a sum of positive squares in 2 ways, for example, as 118984464 + 20106256 = 10908^2 + 4484^2 .

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, 434499 + ... + 434818.

Almost surely, 2^139090720 is an apocalyptic number.

139090720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139090720 is an abundant number, since it is smaller than the sum of its proper divisors (189511484).

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

139090720 is an equidigital number, since it uses as much as digits as its factorization.

139090720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869332 (or 869324 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 139090720 is about 11793.6728799810. The cubic root of 139090720 is about 518.1228173867.

The spelling of 139090720 in words is "one hundred thirty-nine million, ninety thousand, seven hundred twenty".