856944480 has 96 divisors (see below), whose sum is σ = 3085012224. Its totient is φ = 195872256.

The previous prime is 856944469. The next prime is 856944503. The reversal of 856944480 is 84449658.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124162 + ... + 130881.

It is an arithmetic number, because the mean of its divisors is an integer number (32135544).

Almost surely, 2^856944480 is an apocalyptic number.

856944480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

856944480 is an abundant number, since it is smaller than the sum of its proper divisors (2228067744).

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

856944480 is a wasteful number, since it uses less digits than its factorization.

856944480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255068 (or 255060 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 48.

The square root of 856944480 is about 29273.6140577142. The cubic root of 856944480 is about 949.8409632206.

The spelling of 856944480 in words is "eight hundred fifty-six million, nine hundred forty-four thousand, four hundred eighty".