139111644 has 48 divisors (see below), whose sum is σ = 377975808. Its totient is φ = 38995008.

The previous prime is 139111633. The next prime is 139111657. The reversal of 139111644 is 446111931.

It is a congruent number.

It is an unprimeable number.

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, 11172 + ... + 20075.

It is an arithmetic number, because the mean of its divisors is an integer number (7874496).

Almost surely, 2^139111644 is an apocalyptic number.

139111644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

139111644 is an abundant number, since it is smaller than the sum of its proper divisors (238864164).

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

139111644 is a wasteful number, since it uses less digits than its factorization.

139111644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31314 (or 31312 counting only the distinct ones).

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

The square root of 139111644 is about 11794.5599324434. The cubic root of 139111644 is about 518.1487972131.

The spelling of 139111644 in words is "one hundred thirty-nine million, one hundred eleven thousand, six hundred forty-four".