856604007 has 24 divisors (see below), whose sum is σ = 1497259296. Its totient is φ = 460694016.

The previous prime is 856604003. The next prime is 856604009. The reversal of 856604007 is 700406658.

It is a happy number.

It is not a de Polignac number, because 856604007 - 2² = 856604003 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856604003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 398838 + ... + 400979.

It is an arithmetic number, because the mean of its divisors is an integer number (62385804).

Almost surely, 2^856604007 is an apocalyptic number.

856604007 is a deficient number, since it is larger than the sum of its proper divisors (640655289).

856604007 is a wasteful number, since it uses less digits than its factorization.

856604007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799847 (or 799844 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 856604007 is about 29267.7981235350. The cubic root of 856604007 is about 949.7151526426.

The spelling of 856604007 in words is "eight hundred fifty-six million, six hundred four thousand, seven".