139929520 has 20 divisors (see below), whose sum is σ = 325336320. Its totient is φ = 55971776.

The previous prime is 139929511. The next prime is 139929521. The reversal of 139929520 is 25929931.

139929520 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139929521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 874480 + ... + 874639.

It is an arithmetic number, because the mean of its divisors is an integer number (16266816).

Almost surely, 2^139929520 is an apocalyptic number.

139929520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139929520 is an abundant number, since it is smaller than the sum of its proper divisors (185406800).

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

139929520 is a wasteful number, since it uses less digits than its factorization.

139929520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1749132 (or 1749126 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 139929520 is about 11829.1808676679. The cubic root of 139929520 is about 519.1622605627.

The spelling of 139929520 in words is "one hundred thirty-nine million, nine hundred twenty-nine thousand, five hundred twenty".