1931089992 has 48 divisors (see below), whose sum is σ = 5227665840. Its totient is φ = 594180288.

The previous prime is 1931089981. The next prime is 1931089997. The reversal of 1931089992 is 2999801391.

It is not an unprimeable number, because it can be changed into a prime (1931089997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 233998 + ... + 242109.

It is an arithmetic number, because the mean of its divisors is an integer number (108909705).

Almost surely, 2^1931089992 is an apocalyptic number.

1931089992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1931089992 is an abundant number, since it is smaller than the sum of its proper divisors (3296575848).

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

1931089992 is a wasteful number, since it uses less digits than its factorization.

1931089992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476142 (or 476125 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 51.

The square root of 1931089992 is about 43944.1690329900. The cubic root of 1931089992 is about 1245.2814086224.

The spelling of 1931089992 in words is "one billion, nine hundred thirty-one million, eighty-nine thousand, nine hundred ninety-two".