891089368 has 64 divisors (see below), whose sum is σ = 1884254400. Its totient is φ = 391987200.

The previous prime is 891089363. The next prime is 891089369. The reversal of 891089368 is 863980198.

It is a Harshad number since it is a multiple of its sum of digits (52).

Together with 993165032 it forms an amicable pair .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891089363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 958728 + ... + 959656.

It is an arithmetic number, because the mean of its divisors is an integer number (29441475).

Almost surely, 2^891089368 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 891089368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (942127200).

891089368 is an abundant number, since it is smaller than the sum of its proper divisors (993165032).

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

891089368 is a wasteful number, since it uses less digits than its factorization.

891089368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1368 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 52.

The square root of 891089368 is about 29851.1200459882. The cubic root of 891089368 is about 962.2924697445.

The spelling of 891089368 in words is "eight hundred ninety-one million, eighty-nine thousand, three hundred sixty-eight".