1139779044 has 36 divisors (see below), whose sum is σ = 2883076560. Its totient is φ = 379666800.

The previous prime is 1139779037. The next prime is 1139779061. The reversal of 1139779044 is 4409779311.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46819 + ... + 66869.

It is an arithmetic number, because the mean of its divisors is an integer number (80085460).

Almost surely, 2^1139779044 is an apocalyptic number.

It is an amenable number.

1139779044 is an abundant number, since it is smaller than the sum of its proper divisors (1743297516).

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

1139779044 is a wasteful number, since it uses less digits than its factorization.

1139779044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640 (or 21635 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 45.

The square root of 1139779044 is about 33760.6137977377. The cubic root of 1139779044 is about 1044.5764311329.

The spelling of 1139779044 in words is "one billion, one hundred thirty-nine million, seven hundred seventy-nine thousand, forty-four".