1139931380 has 48 divisors (see below), whose sum is σ = 2824098816. Its totient is φ = 378224640.

The previous prime is 1139931361. The next prime is 1139931383. The reversal of 1139931380 is 831399311.

It is a super-2 number, since 2×1139931380² = 2598887102217408800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1139931383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126989 + ... + 135668.

It is an arithmetic number, because the mean of its divisors is an integer number (58835392).

Almost surely, 2^1139931380 is an apocalyptic number.

1139931380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1139931380 is an abundant number, since it is smaller than the sum of its proper divisors (1684167436).

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

1139931380 is a wasteful number, since it uses less digits than its factorization.

1139931380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262704 (or 262702 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 38.

The square root of 1139931380 is about 33762.8698424764. The cubic root of 1139931380 is about 1044.6229663239.

The spelling of 1139931380 in words is "one billion, one hundred thirty-nine million, nine hundred thirty-one thousand, three hundred eighty".