811091232 has 168 divisors, whose sum is σ = 2736732096. Its totient is φ = 231693696.

The previous prime is 811091191. The next prime is 811091243. The reversal of 811091232 is 232190118.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 811091196 and 811091205.

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 160813 + ... + 165779.

It is an arithmetic number, because the mean of its divisors is an integer number (16290072).

Almost surely, 2^811091232 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 811091232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1368366048).

811091232 is an abundant number, since it is smaller than the sum of its proper divisors (1925640864).

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

811091232 is an equidigital number, since it uses as much as digits as its factorization.

811091232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5002 (or 4979 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 811091232 is about 28479.6634811579. The cubic root of 811091232 is about 932.5881703078.

The spelling of 811091232 in words is "eight hundred eleven million, ninety-one thousand, two hundred thirty-two".