856286320 has 40 divisors (see below), whose sum is σ = 2077429536. Its totient is φ = 327621888.

The previous prime is 856286317. The next prime is 856286323. The reversal of 856286320 is 23682658.

It is an interprime number because it is at equal distance from previous prime (856286317) and next prime (856286323).

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856286323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230847 + ... + 234526.

Almost surely, 2^856286320 is an apocalyptic number.

856286320 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

856286320 is an abundant number, since it is smaller than the sum of its proper divisors (1221143216).

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

856286320 is a wasteful number, since it uses less digits than its factorization.

856286320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465409 (or 465403 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 856286320 is about 29262.3703756206. The cubic root of 856286320 is about 949.5977318113.

The spelling of 856286320 in words is "eight hundred fifty-six million, two hundred eighty-six thousand, three hundred twenty".