809249056 has 48 divisors (see below), whose sum is σ = 1986344640. Its totient is φ = 315290880.

The previous prime is 809249041. The next prime is 809249059. The reversal of 809249056 is 650942908.

It is a super-2 number, since 2×809249056² = 1309768069273782272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (809249059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161751 + ... + 166678.

It is an arithmetic number, because the mean of its divisors is an integer number (41382180).

Almost surely, 2^809249056 is an apocalyptic number.

It is an amenable number.

809249056 is an abundant number, since it is smaller than the sum of its proper divisors (1177095584).

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

809249056 is a wasteful number, since it uses less digits than its factorization.

809249056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328457 (or 328449 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 809249056 is about 28447.3031410712. The cubic root of 809249056 is about 931.8815938779.

The spelling of 809249056 in words is "eight hundred nine million, two hundred forty-nine thousand, fifty-six".