957991820 has 24 divisors (see below), whose sum is σ = 2130123744. Its totient is φ = 360655616.

The previous prime is 957991819. The next prime is 957991843. The reversal of 957991820 is 28199759.

It is a happy number.

957991820 is digitally balanced in base 2, 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, 1408472 + ... + 1409151.

It is an arithmetic number, because the mean of its divisors is an integer number (88755156).

Almost surely, 2^957991820 is an apocalyptic number.

It is an amenable number.

957991820 is an abundant number, since it is smaller than the sum of its proper divisors (1172131924).

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

957991820 is a wasteful number, since it uses less digits than its factorization.

957991820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817649 (or 2817647 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 957991820 is about 30951.4429389003. The cubic root of 957991820 is about 985.7964887387.

The spelling of 957991820 in words is "nine hundred fifty-seven million, nine hundred ninety-one thousand, eight hundred twenty".