809956432 has 20 divisors (see below), whose sum is σ = 1661602356. Its totient is φ = 381155840.

The previous prime is 809956429. The next prime is 809956439. The reversal of 809956432 is 234659908.

It can be written as a sum of positive squares in 2 ways, for example, as 687278656 + 122677776 = 26216^2 + 11076^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809956439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1488619 + ... + 1489162.

Almost surely, 2^809956432 is an apocalyptic number.

It is an amenable number.

809956432 is an abundant number, since it is smaller than the sum of its proper divisors (851645924).

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

809956432 is a wasteful number, since it uses less digits than its factorization.

809956432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2977806 (or 2977800 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 809956432 is about 28459.7335194833. The cubic root of 809956432 is about 932.1530384117.

The spelling of 809956432 in words is "eight hundred nine million, nine hundred fifty-six thousand, four hundred thirty-two".