2991000920 has 16 divisors (see below), whose sum is σ = 6729752160. Its totient is φ = 1196400352.

The previous prime is 2991000889. The next prime is 2991000959. The reversal of 2991000920 is 290001992.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37387472 + ... + 37387551.

It is an arithmetic number, because the mean of its divisors is an integer number (420609510).

Almost surely, 2^2991000920 is an apocalyptic number.

2991000920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2991000920 is an abundant number, since it is smaller than the sum of its proper divisors (3738751240).

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

2991000920 is a wasteful number, since it uses less digits than its factorization.

2991000920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74775034 (or 74775030 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 2991000920 is about 54690.0440665392. The cubic root of 2991000920 is about 1440.8060238045.

The spelling of 2991000920 in words is "two billion, nine hundred ninety-one million, nine hundred twenty", and thus it is an aban number.