2809562172 has 48 divisors (see below), whose sum is σ = 6610044672. Its totient is φ = 928771200.

The previous prime is 2809562089. The next prime is 2809562191. The reversal of 2809562172 is 2712659082.

2809562172 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726023 + ... + 1727649.

It is an arithmetic number, because the mean of its divisors is an integer number (137709264).

Almost surely, 2^2809562172 is an apocalyptic number.

It is an amenable number.

2809562172 is an abundant number, since it is smaller than the sum of its proper divisors (3800482500).

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

2809562172 is a wasteful number, since it uses less digits than its factorization.

2809562172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738 (or 2736 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 2809562172 is about 53005.3032441095. The cubic root of 2809562172 is about 1411.0623872945.

It can be divided in two parts, 280956 and 2172, that added together give a triangular number (283128 = T₇₅₂).

The spelling of 2809562172 in words is "two billion, eight hundred nine million, five hundred sixty-two thousand, one hundred seventy-two".