1139656944 has 40 divisors (see below), whose sum is σ = 2945503440. Its totient is φ = 379706368.

The previous prime is 1139656913. The next prime is 1139656963. The reversal of 1139656944 is 4496569311.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1139656893 and 1139656902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131992 + ... + 140360.

It is an arithmetic number, because the mean of its divisors is an integer number (73637586).

Almost surely, 2^1139656944 is an apocalyptic number.

It is an amenable number.

1139656944 is an abundant number, since it is smaller than the sum of its proper divisors (1805846496).

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

1139656944 is a wasteful number, since it uses less digits than its factorization.

1139656944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11217 (or 11211 counting only the distinct ones).

The product of its digits is 699840, while the sum is 48.

The square root of 1139656944 is about 33758.8054291025. The cubic root of 1139656944 is about 1044.5391293601.

The spelling of 1139656944 in words is "one billion, one hundred thirty-nine million, six hundred fifty-six thousand, nine hundred forty-four".