856679550 has 24 divisors (see below), whose sum is σ = 2124565656. Its totient is φ = 228447840.

The previous prime is 856679533. The next prime is 856679561. The reversal of 856679550 is 55976658.

It is a junction number, because it is equal to n+sod(n) for n = 856679493 and 856679502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2855449 + ... + 2855748.

It is an arithmetic number, because the mean of its divisors is an integer number (88523569).

Almost surely, 2^856679550 is an apocalyptic number.

856679550 is an abundant number, since it is smaller than the sum of its proper divisors (1267886106).

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

856679550 is a wasteful number, since it uses less digits than its factorization.

856679550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5711212 (or 5711207 counting only the distinct ones).

The product of its (nonzero) digits is 2268000, while the sum is 51.

The square root of 856679550 is about 29269.0886431402. The cubic root of 856679550 is about 949.7430699464.

The spelling of 856679550 in words is "eight hundred fifty-six million, six hundred seventy-nine thousand, five hundred fifty".