2856645672 has 32 divisors (see below), whose sum is σ = 7210956480. Its totient is φ = 942969600.

The previous prime is 2856645653. The next prime is 2856645679. The reversal of 2856645672 is 2765466582.

It is not an unprimeable number, because it can be changed into a prime (2856645679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 575329 + ... + 580272.

It is an arithmetic number, because the mean of its divisors is an integer number (225342390).

Almost surely, 2^2856645672 is an apocalyptic number.

It is an amenable number.

2856645672 is an abundant number, since it is smaller than the sum of its proper divisors (4354310808).

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

2856645672 is a wasteful number, since it uses less digits than its factorization.

2856645672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155713 (or 1155709 counting only the distinct ones).

The product of its digits is 4838400, while the sum is 51.

The square root of 2856645672 is about 53447.5974389869. The cubic root of 2856645672 is about 1418.9010991574.

The spelling of 2856645672 in words is "two billion, eight hundred fifty-six million, six hundred forty-five thousand, six hundred seventy-two".