891164372 has 72 divisors (see below), whose sum is σ = 1941438240. Its totient is φ = 355803840.

The previous prime is 891164357. The next prime is 891164389. The reversal of 891164372 is 273461198.

891164372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225203 + ... + 229125.

It is an arithmetic number, because the mean of its divisors is an integer number (26964420).

Almost surely, 2^891164372 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 891164372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (970719120).

891164372 is an abundant number, since it is smaller than the sum of its proper divisors (1050273868).

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

891164372 is a wasteful number, since it uses less digits than its factorization.

891164372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4021 (or 4012 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The square root of 891164372 is about 29852.3763208224. The cubic root of 891164372 is about 962.3194680689.

The spelling of 891164372 in words is "eight hundred ninety-one million, one hundred sixty-four thousand, three hundred seventy-two".