809992456 has 64 divisors (see below), whose sum is σ = 1919796480. Its totient is φ = 311765760.

The previous prime is 809992453. The next prime is 809992457. The reversal of 809992456 is 654299908.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is not an unprimeable number, because it can be changed into a prime (809992453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11901 + ... + 41971.

It is an arithmetic number, because the mean of its divisors is an integer number (29996820).

Almost surely, 2^809992456 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 809992456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959898240).

809992456 is an abundant number, since it is smaller than the sum of its proper divisors (1109804024).

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

809992456 is a wasteful number, since it uses less digits than its factorization.

809992456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30134 (or 30130 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 52.

The square root of 809992456 is about 28460.3664066364. The cubic root of 809992456 is about 932.1668578312.

The spelling of 809992456 in words is "eight hundred nine million, nine hundred ninety-two thousand, four hundred fifty-six".