808899840 has 324 divisors, whose sum is σ = 3257913204. Its totient is φ = 184762368.

The previous prime is 808899829. The next prime is 808899851. The reversal of 808899840 is 48998808.

It is an interprime number because it is at equal distance from previous prime (808899829) and next prime (808899851).

It can be written as a sum of positive squares in 2 ways, for example, as 491774976 + 317124864 = 22176^2 + 17808^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 563764 + ... + 565196.

Almost surely, 2^808899840 is an apocalyptic number.

808899840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 808899840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1628956602).

808899840 is an abundant number, since it is smaller than the sum of its proper divisors (2449013364).

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

808899840 is a wasteful number, since it uses less digits than its factorization.

808899840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1474 (or 1450 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 54.

The square root of 808899840 is about 28441.1645331199. The cubic root of 808899840 is about 931.7475293472.

The spelling of 808899840 in words is "eight hundred eight million, eight hundred ninety-nine thousand, eight hundred forty".