808669920 has 96 divisors (see below), whose sum is σ = 2553731712. Its totient is φ = 215101952.

The previous prime is 808669909. The next prime is 808669987. The reversal of 808669920 is 29966808.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 808669920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 210739 + ... + 214541.

It is an arithmetic number, because the mean of its divisors is an integer number (26601372).

Almost surely, 2^808669920 is an apocalyptic number.

808669920 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 808669920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1276865856).

808669920 is an abundant number, since it is smaller than the sum of its proper divisors (1745061792).

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

808669920 is a wasteful number, since it uses less digits than its factorization.

808669920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4264 (or 4256 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 48.

The square root of 808669920 is about 28437.1222172709. The cubic root of 808669920 is about 931.6592416583.

The spelling of 808669920 in words is "eight hundred eight million, six hundred sixty-nine thousand, nine hundred twenty".