811988460 has 72 divisors (see below), whose sum is σ = 2468671296. Its totient is φ = 216034560.

The previous prime is 811988453. The next prime is 811988483. The reversal of 811988460 is 64889118.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 77325 + ... + 87195.

Almost surely, 2^811988460 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 811988460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234335648).

811988460 is an abundant number, since it is smaller than the sum of its proper divisors (1656682836).

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

811988460 is a wasteful number, since it uses less digits than its factorization.

811988460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10343 (or 10338 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 811988460 is about 28495.4112095264. The cubic root of 811988460 is about 932.9319195024.

The spelling of 811988460 in words is "eight hundred eleven million, nine hundred eighty-eight thousand, four hundred sixty".