812184480 has 72 divisors (see below), whose sum is σ = 2771584452. Its totient is φ = 216582144.

The previous prime is 812184479. The next prime is 812184511. The reversal of 812184480 is 84481218.

It is a happy number.

812184480 is a `hidden beast` number, since 81 + 21 + 84 + 480 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 733543056 + 78641424 = 27084^2 + 8868^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 280569 + ... + 283448.

Almost surely, 2^812184480 is an apocalyptic number.

812184480 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

812184480 is an abundant number, since it is smaller than the sum of its proper divisors (1959399972).

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

812184480 is a wasteful number, since it uses less digits than its factorization.

812184480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564038 (or 564027 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 36.

The square root of 812184480 is about 28498.8505031343. The cubic root of 812184480 is about 933.0069856764.

The spelling of 812184480 in words is "eight hundred twelve million, one hundred eighty-four thousand, four hundred eighty".