139490520 has 64 divisors (see below), whose sum is σ = 450666720. Its totient is φ = 34335744.

The previous prime is 139490513. The next prime is 139490521. The reversal of 139490520 is 25094931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139490521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43149 + ... + 46268.

Almost surely, 2^139490520 is an apocalyptic number.

139490520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139490520 is an abundant number, since it is smaller than the sum of its proper divisors (311176200).

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

139490520 is a wasteful number, since it uses less digits than its factorization.

139490520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89444 (or 89440 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 139490520 is about 11810.6104837980. The cubic root of 139490520 is about 518.6187703084.

The spelling of 139490520 in words is "one hundred thirty-nine million, four hundred ninety thousand, five hundred twenty".