809252988 has 24 divisors (see below), whose sum is σ = 1911009408. Its totient is φ = 266500656.

The previous prime is 809252987. The next prime is 809253013. The reversal of 809252988 is 889252908.

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 809252988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (809252981) 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, 405256 + ... + 407247.

It is an arithmetic number, because the mean of its divisors is an integer number (79625392).

Almost surely, 2^809252988 is an apocalyptic number.

It is an amenable number.

809252988 is an abundant number, since it is smaller than the sum of its proper divisors (1101756420).

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

809252988 is a wasteful number, since it uses less digits than its factorization.

809252988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812593 (or 812591 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 51.

The square root of 809252988 is about 28447.3722512291. The cubic root of 809252988 is about 931.8831031588.

The spelling of 809252988 in words is "eight hundred nine million, two hundred fifty-two thousand, nine hundred eighty-eight".