809911952 has 20 divisors (see below), whose sum is σ = 1619824896. Its totient is φ = 391892640.

The previous prime is 809911937. The next prime is 809911957. The reversal of 809911952 is 259119908.

It is a happy number.

809911952 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (809911957) 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, 815948 + ... + 816939.

Almost surely, 2^809911952 is an apocalyptic number.

It is an amenable number.

809911952 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

809911952 is a wasteful number, since it uses less digits than its factorization.

809911952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632926 (or 1632920 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 44.

The square root of 809911952 is about 28458.9520537914. The cubic root of 809911952 is about 932.1359745613.

The spelling of 809911952 in words is "eight hundred nine million, nine hundred eleven thousand, nine hundred fifty-two".