856018992 has 90 divisors (see below), whose sum is σ = 2288853876. Its totient is φ = 275677440.

The previous prime is 856018937. The next prime is 856018993. The reversal of 856018992 is 299810658.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (856018993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8310813 + ... + 8310915.

Almost surely, 2^856018992 is an apocalyptic number.

856018992 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 856018992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144426938).

856018992 is an abundant number, since it is smaller than the sum of its proper divisors (1432834884).

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

856018992 is a wasteful number, since it uses less digits than its factorization.

856018992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 856018992 is about 29257.8022414535. The cubic root of 856018992 is about 949.4989017516.

Multiplying 856018992 by its sum of digits (48), we get a square (41088911616 = 202704²).

856018992 divided by its sum of digits (48) gives a square (17833729 = 4223²).

The spelling of 856018992 in words is "eight hundred fifty-six million, eighteen thousand, nine hundred ninety-two".