139711920 has 80 divisors (see below), whose sum is σ = 434243040. Its totient is φ = 37158912.

The previous prime is 139711903. The next prime is 139711927. The reversal of 139711920 is 29117931.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (139711927) 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 15 ways as a sum of consecutive naturals, for example, 181296 + ... + 182064.

It is an arithmetic number, because the mean of its divisors is an integer number (5428038).

Almost surely, 2^139711920 is an apocalyptic number.

139711920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139711920 is an abundant number, since it is smaller than the sum of its proper divisors (294531120).

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

139711920 is a wasteful number, since it uses less digits than its factorization.

139711920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1542 (or 1536 counting only the distinct ones).

The product of its (nonzero) digits is 3402, while the sum is 33.

The square root of 139711920 is about 11819.9796954140. The cubic root of 139711920 is about 518.8930099735.

The spelling of 139711920 in words is "one hundred thirty-nine million, seven hundred eleven thousand, nine hundred twenty".