856826004 has 24 divisors (see below), whose sum is σ = 1999736928. Its totient is φ = 285540640.

The previous prime is 856825951. The next prime is 856826011. The reversal of 856826004 is 400628658.

It is a super-2 number, since 2×856826004² = 1468301602261216032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85834 + ... + 95294.

It is an arithmetic number, because the mean of its divisors is an integer number (83322372).

Almost surely, 2^856826004 is an apocalyptic number.

It is an amenable number.

856826004 is an abundant number, since it is smaller than the sum of its proper divisors (1142910924).

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

856826004 is a wasteful number, since it uses less digits than its factorization.

856826004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17015 (or 17013 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 856826004 is about 29271.5903906843. The cubic root of 856826004 is about 949.7971880998.

The spelling of 856826004 in words is "eight hundred fifty-six million, eight hundred twenty-six thousand, four".