991074120 has 32 divisors (see below), whose sum is σ = 2973222720. Its totient is φ = 264286400.

The previous prime is 991074113. The next prime is 991074131. The reversal of 991074120 is 21470199.

It is a super-2 number, since 2×991074120² = 1964455822667548800, which contains 22 as substring.

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, 4129356 + ... + 4129595.

It is an arithmetic number, because the mean of its divisors is an integer number (92913210).

Almost surely, 2^991074120 is an apocalyptic number.

It is an amenable number.

991074120 is an abundant number, since it is smaller than the sum of its proper divisors (1982148600).

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

991074120 is a wasteful number, since it uses less digits than its factorization.

991074120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8258965 (or 8258961 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 991074120 is about 31481.3297050808. The cubic root of 991074120 is about 997.0158101360.

The spelling of 991074120 in words is "nine hundred ninety-one million, seventy-four thousand, one hundred twenty".