891355256 has 32 divisors (see below), whose sum is σ = 1865635200. Its totient is φ = 395737440.

The previous prime is 891355243. The next prime is 891355259. The reversal of 891355256 is 652553198.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891355259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 113996 + ... + 121563.

It is an arithmetic number, because the mean of its divisors is an integer number (58301100).

Almost surely, 2^891355256 is an apocalyptic number.

891355256 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

891355256 is an abundant number, since it is smaller than the sum of its proper divisors (974279944).

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

891355256 is a wasteful number, since it uses less digits than its factorization.

891355256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235619 (or 235615 counting only the distinct ones).

The product of its digits is 324000, while the sum is 44.

The square root of 891355256 is about 29855.5732820524. The cubic root of 891355256 is about 962.3881715469.

The spelling of 891355256 in words is "eight hundred ninety-one million, three hundred fifty-five thousand, two hundred fifty-six".