2891512904 has 32 divisors (see below), whose sum is σ = 6198811200. Its totient is φ = 1238677440.

The previous prime is 2891512861. The next prime is 2891512907. The reversal of 2891512904 is 4092151982.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2891512907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134414 + ... + 154434.

It is an arithmetic number, because the mean of its divisors is an integer number (193712850).

Almost surely, 2^2891512904 is an apocalyptic number.

It is an amenable number.

2891512904 is an abundant number, since it is smaller than the sum of its proper divisors (3307298296).

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

2891512904 is a wasteful number, since it uses less digits than its factorization.

2891512904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22613 (or 22609 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 2891512904 is about 53772.7896244932. The cubic root of 2891512904 is about 1424.6506424173.

The spelling of 2891512904 in words is "two billion, eight hundred ninety-one million, five hundred twelve thousand, nine hundred four".