856736572 has 6 divisors (see below), whose sum is σ = 1499289008. Its totient is φ = 428368284.

The previous prime is 856736567. The next prime is 856736579. The reversal of 856736572 is 275637658.

It is a super-2 number, since 2×856736572² = 1467995107604622368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856736579) 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 as a sum of consecutive naturals, namely, 107092068 + ... + 107092075.

Almost surely, 2^856736572 is an apocalyptic number.

It is an amenable number.

856736572 is a deficient number, since it is larger than the sum of its proper divisors (642552436).

856736572 is a wasteful number, since it uses less digits than its factorization.

856736572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214184147 (or 214184145 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 49.

The square root of 856736572 is about 29270.0627262738. The cubic root of 856736572 is about 949.7641416325.

The spelling of 856736572 in words is "eight hundred fifty-six million, seven hundred thirty-six thousand, five hundred seventy-two".