862790256 has 120 divisors (see below), whose sum is σ = 2580102720. Its totient is φ = 268197888.

The previous prime is 862790251. The next prime is 862790261. The reversal of 862790256 is 652097268.

It is an interprime number because it is at equal distance from previous prime (862790251) and next prime (862790261).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (862790251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275065 + ... + 278183.

It is an arithmetic number, because the mean of its divisors is an integer number (21500856).

Almost surely, 2^862790256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 862790256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1290051360).

862790256 is an abundant number, since it is smaller than the sum of its proper divisors (1717312464).

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

862790256 is a wasteful number, since it uses less digits than its factorization.

862790256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3263 (or 3254 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 862790256 is about 29373.2915418072. The cubic root of 862790256 is about 951.9958983417.

The spelling of 862790256 in words is "eight hundred sixty-two million, seven hundred ninety thousand, two hundred fifty-six".