404392680 has 96 divisors (see below), whose sum is σ = 1318917600. Its totient is φ = 107457408.

The previous prime is 404392673. The next prime is 404392691. The reversal of 404392680 is 86293404.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 108691 + ... + 112349.

It is an arithmetic number, because the mean of its divisors is an integer number (13738725).

Almost surely, 2^404392680 is an apocalyptic number.

404392680 is a gapful number since it is divisible by the number (40) 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 404392680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (659458800).

404392680 is an abundant number, since it is smaller than the sum of its proper divisors (914524920).

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

404392680 is a wasteful number, since it uses less digits than its factorization.

404392680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3983 (or 3976 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 404392680 is about 20109.5171498472. The cubic root of 404392680 is about 739.4936150869.

The spelling of 404392680 in words is "four hundred four million, three hundred ninety-two thousand, six hundred eighty".