856633730 has 16 divisors (see below), whose sum is σ = 1542481920. Its totient is φ = 342533232.

The previous prime is 856633709. The next prime is 856633741. The reversal of 856633730 is 37336658.

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, 18431 + ... + 45309.

It is an arithmetic number, because the mean of its divisors is an integer number (96405120).

Almost surely, 2^856633730 is an apocalyptic number.

856633730 is a deficient number, since it is larger than the sum of its proper divisors (685848190).

856633730 is a wasteful number, since it uses less digits than its factorization.

856633730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30073.

The product of its (nonzero) digits is 272160, while the sum is 41.

The square root of 856633730 is about 29268.3058956271. The cubic root of 856633730 is about 949.7261371258.

The spelling of 856633730 in words is "eight hundred fifty-six million, six hundred thirty-three thousand, seven hundred thirty".