811896984 has 96 divisors (see below), whose sum is σ = 2245501440. Its totient is φ = 264960000.

The previous prime is 811896979. The next prime is 811897001. The reversal of 811896984 is 489698118.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 811896984.

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, 704809 + ... + 705959.

It is an arithmetic number, because the mean of its divisors is an integer number (23390640).

Almost surely, 2^811896984 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 811896984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1122750720).

811896984 is an abundant number, since it is smaller than the sum of its proper divisors (1433604456).

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

811896984 is a wasteful number, since it uses less digits than its factorization.

811896984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361 (or 1354 counting only the distinct ones).

The product of its digits is 995328, while the sum is 54.

The square root of 811896984 is about 28493.8060637746. The cubic root of 811896984 is about 932.8968844867.

The spelling of 811896984 in words is "eight hundred eleven million, eight hundred ninety-six thousand, nine hundred eighty-four".