856492456 has 8 divisors (see below), whose sum is σ = 1605923370. Its totient is φ = 428246224.

The previous prime is 856492451. The next prime is 856492471. The reversal of 856492456 is 654294658.

It can be written as a sum of positive squares in only one way, i.e., 629508100 + 226984356 = 25090^2 + 15066^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (856492451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53530771 + ... + 53530786.

Almost surely, 2^856492456 is an apocalyptic number.

It is an amenable number.

856492456 is a deficient number, since it is larger than the sum of its proper divisors (749430914).

856492456 is a wasteful number, since it uses less digits than its factorization.

856492456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107061563 (or 107061559 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 49.

The square root of 856492456 is about 29265.8923663708. The cubic root of 856492456 is about 949.6739253959.

The spelling of 856492456 in words is "eight hundred fifty-six million, four hundred ninety-two thousand, four hundred fifty-six".