2856391628 has 24 divisors (see below), whose sum is σ = 5077616544. Its totient is φ = 1405712000.

The previous prime is 2856391609. The next prime is 2856391709. The reversal of 2856391628 is 8261936582.

It is an unprimeable number.

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, 167078 + ... + 183378.

It is an arithmetic number, because the mean of its divisors is an integer number (211567356).

Almost surely, 2^2856391628 is an apocalyptic number.

It is an amenable number.

2856391628 is a deficient number, since it is larger than the sum of its proper divisors (2221224916).

2856391628 is a wasteful number, since it uses less digits than its factorization.

2856391628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16993 (or 16991 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 50.

The square root of 2856391628 is about 53445.2208153358. The cubic root of 2856391628 is about 1418.8590365383.

The spelling of 2856391628 in words is "two billion, eight hundred fifty-six million, three hundred ninety-one thousand, six hundred twenty-eight".