1139431884 has 24 divisors (see below), whose sum is σ = 2682205680. Its totient is φ = 376449024.

The previous prime is 1139431879. The next prime is 1139431913. The reversal of 1139431884 is 4881349311.

It is a happy number.

1139431884 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 418789 + ... + 421500.

It is an arithmetic number, because the mean of its divisors is an integer number (111758570).

Almost surely, 2^1139431884 is an apocalyptic number.

It is an amenable number.

1139431884 is an abundant number, since it is smaller than the sum of its proper divisors (1542773796).

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

1139431884 is a wasteful number, since it uses less digits than its factorization.

1139431884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 840409 (or 840407 counting only the distinct ones).

The product of its digits is 82944, while the sum is 42.

The square root of 1139431884 is about 33755.4719119730. The cubic root of 1139431884 is about 1044.4703661373.

The spelling of 1139431884 in words is "one billion, one hundred thirty-nine million, four hundred thirty-one thousand, eight hundred eighty-four".