404963988 has 96 divisors (see below), whose sum is σ = 1114753920. Its totient is φ = 112803840.

The previous prime is 404963969. The next prime is 404964029. The reversal of 404963988 is 889369404.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 404963988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 701556 + ... + 702132.

It is an arithmetic number, because the mean of its divisors is an integer number (11612020).

Almost surely, 2^404963988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404963988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (557376960).

404963988 is an abundant number, since it is smaller than the sum of its proper divisors (709789932).

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

404963988 is a wasteful number, since it uses less digits than its factorization.

404963988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1015 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 51.

The square root of 404963988 is about 20123.7170522744. The cubic root of 404963988 is about 739.8416924567.

The spelling of 404963988 in words is "four hundred four million, nine hundred sixty-three thousand, nine hundred eighty-eight".