992120840 has 32 divisors (see below), whose sum is σ = 2248344000. Its totient is φ = 393991104.

The previous prime is 992120839. The next prime is 992120861. The reversal of 992120840 is 48021299.

It is a super-2 number, since 2×992120840² = 1968607522324611200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 992120840.

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, 83660 + ... + 94779.

It is an arithmetic number, because the mean of its divisors is an integer number (70260750).

Almost surely, 2^992120840 is an apocalyptic number.

It is an amenable number.

992120840 is an abundant number, since it is smaller than the sum of its proper divisors (1256223160).

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

992120840 is a wasteful number, since it uses less digits than its factorization.

992120840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178589 (or 178585 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 992120840 is about 31497.9497745488. The cubic root of 992120840 is about 997.3666850726.

The spelling of 992120840 in words is "nine hundred ninety-two million, one hundred twenty thousand, eight hundred forty".