809902148 has 24 divisors (see below), whose sum is σ = 1548571584. Its totient is φ = 367567200.

The previous prime is 809902127. The next prime is 809902193. The reversal of 809902148 is 841209908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15161 + ... + 43007.

It is an arithmetic number, because the mean of its divisors is an integer number (64523816).

Almost surely, 2^809902148 is an apocalyptic number.

It is an amenable number.

809902148 is a deficient number, since it is larger than the sum of its proper divisors (738669436).

809902148 is a wasteful number, since it uses less digits than its factorization.

809902148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28523 (or 28521 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 809902148 is about 28458.7798051849. The cubic root of 809902148 is about 932.1322133714.

It can be divided in two parts, 80990 and 2148, that added together give a palindrome (83138).

The spelling of 809902148 in words is "eight hundred nine million, nine hundred two thousand, one hundred forty-eight".