856610406 has 24 divisors (see below), whose sum is σ = 1856555064. Its totient is φ = 285449760.

The previous prime is 856610401. The next prime is 856610411. The reversal of 856610406 is 604016658.

It is an interprime number because it is at equal distance from previous prime (856610401) and next prime (856610411).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856610401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 85450 + ... + 94946.

It is an arithmetic number, because the mean of its divisors is an integer number (77356461).

Almost surely, 2^856610406 is an apocalyptic number.

856610406 is an abundant number, since it is smaller than the sum of its proper divisors (999944658).

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

856610406 is a wasteful number, since it uses less digits than its factorization.

856610406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14516 (or 14513 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 856610406 is about 29267.9074414281. The cubic root of 856610406 is about 949.7175174895.

The spelling of 856610406 in words is "eight hundred fifty-six million, six hundred ten thousand, four hundred six".