891152934 has 64 divisors (see below), whose sum is σ = 2148249600. Its totient is φ = 240751008.

The previous prime is 891152921. The next prime is 891152993. The reversal of 891152934 is 439251198.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 707197 + ... + 708455.

It is an arithmetic number, because the mean of its divisors is an integer number (33566400).

Almost surely, 2^891152934 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 891152934, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1074124800).

891152934 is an abundant number, since it is smaller than the sum of its proper divisors (1257096666).

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

891152934 is a wasteful number, since it uses less digits than its factorization.

891152934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2177.

The product of its digits is 77760, while the sum is 42.

The square root of 891152934 is about 29852.1847441691. The cubic root of 891152934 is about 962.3153509619.

The spelling of 891152934 in words is "eight hundred ninety-one million, one hundred fifty-two thousand, nine hundred thirty-four".