808831440 has 160 divisors (see below), whose sum is σ = 2949989760. Its totient is φ = 202991616.

The previous prime is 808831421. The next prime is 808831453. The reversal of 808831440 is 44138808.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 808831395 and 808831404.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 25707 + ... + 47733.

It is an arithmetic number, because the mean of its divisors is an integer number (18437436).

Almost surely, 2^808831440 is an apocalyptic number.

808831440 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 808831440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1474994880).

808831440 is an abundant number, since it is smaller than the sum of its proper divisors (2141158320).

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

808831440 is a wasteful number, since it uses less digits than its factorization.

808831440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22066 (or 22054 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 808831440 is about 28439.9620252911. The cubic root of 808831440 is about 931.7212659689.

The spelling of 808831440 in words is "eight hundred eight million, eight hundred thirty-one thousand, four hundred forty".