808821984 has 48 divisors (see below), whose sum is σ = 2126621952. Its totient is φ = 269167488.

The previous prime is 808821983. The next prime is 808821991. The reversal of 808821984 is 489128808.

It is a tau number, because it is divible by the number of its divisors (48).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (808821983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55177 + ... + 68279.

It is an arithmetic number, because the mean of its divisors is an integer number (44304624).

Almost surely, 2^808821984 is an apocalyptic number.

It is an amenable number.

808821984 is an abundant number, since it is smaller than the sum of its proper divisors (1317799968).

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

808821984 is a wasteful number, since it uses less digits than its factorization.

808821984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13759 (or 13751 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 808821984 is about 28439.7957798575. The cubic root of 808821984 is about 931.7176350556.

The spelling of 808821984 in words is "eight hundred eight million, eight hundred twenty-one thousand, nine hundred eighty-four".