808278440 has 16 divisors (see below), whose sum is σ = 1818626580. Its totient is φ = 323311360.

The previous prime is 808278437. The next prime is 808278511. The reversal of 808278440 is 44872808.

It can be written as a sum of positive squares in 2 ways, for example, as 732135364 + 76143076 = 27058^2 + 8726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10103441 + ... + 10103520.

Almost surely, 2^808278440 is an apocalyptic number.

It is an amenable number.

808278440 is an abundant number, since it is smaller than the sum of its proper divisors (1010348140).

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

808278440 is a wasteful number, since it uses less digits than its factorization.

808278440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20206972 (or 20206968 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 41.

The square root of 808278440 is about 28430.2381277400. The cubic root of 808278440 is about 931.5088775349.

The spelling of 808278440 in words is "eight hundred eight million, two hundred seventy-eight thousand, four hundred forty".