822991464 has 48 divisors (see below), whose sum is σ = 2305800900. Its totient is φ = 264870144.

The previous prime is 822991447. The next prime is 822991487. The reversal of 822991464 is 464199228.

822991464 is a `hidden beast` number, since 82 + 29 + 91 + 464 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 724148100 + 98843364 = 26910^2 + 9942^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 194989 + ... + 199164.

Almost surely, 2^822991464 is an apocalyptic number.

It is an amenable number.

822991464 is an abundant number, since it is smaller than the sum of its proper divisors (1482809436).

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

822991464 is a wasteful number, since it uses less digits than its factorization.

822991464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394194 (or 394187 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 822991464 is about 28687.8278020487. The cubic root of 822991464 is about 937.1269846165.

The spelling of 822991464 in words is "eight hundred twenty-two million, nine hundred ninety-one thousand, four hundred sixty-four".