139311840 has 48 divisors (see below), whose sum is σ = 438833808. Its totient is φ = 37149696.

The previous prime is 139311829. The next prime is 139311841. The reversal of 139311840 is 48113931.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 139311798 and 139311807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139311841) 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 7 ways as a sum of consecutive naturals, for example, 144637 + ... + 145596.

It is an arithmetic number, because the mean of its divisors is an integer number (9142371).

Almost surely, 2^139311840 is an apocalyptic number.

139311840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

139311840 is an abundant number, since it is smaller than the sum of its proper divisors (299521968).

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

139311840 is a wasteful number, since it uses less digits than its factorization.

139311840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290251 (or 290243 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 139311840 is about 11803.0436752560. The cubic root of 139311840 is about 518.3972345913.

The spelling of 139311840 in words is "one hundred thirty-nine million, three hundred eleven thousand, eight hundred forty".