891011832 has 64 divisors (see below), whose sum is σ = 2286571680. Its totient is φ = 289216512.

The previous prime is 891011831. The next prime is 891011861. The reversal of 891011832 is 238110198.

It is a junction number, because it is equal to n+sod(n) for n = 891011793 and 891011802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891011831) 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, 171708 + ... + 176820.

Almost surely, 2^891011832 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 891011832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1143285840).

891011832 is an abundant number, since it is smaller than the sum of its proper divisors (1395559848).

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

891011832 is a wasteful number, since it uses less digits than its factorization.

891011832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312 (or 5308 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 33.

The square root of 891011832 is about 29849.8213059978. The cubic root of 891011832 is about 962.2645584127.

The spelling of 891011832 in words is "eight hundred ninety-one million, eleven thousand, eight hundred thirty-two".