404392086 has 96 divisors (see below), whose sum is σ = 1088256000. Its totient is φ = 105909120.

The previous prime is 404392069. The next prime is 404392091. The reversal of 404392086 is 680293404.

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 404392086.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 71490 + ... + 76938.

It is an arithmetic number, because the mean of its divisors is an integer number (11336000).

Almost surely, 2^404392086 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 404392086, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544128000).

404392086 is an abundant number, since it is smaller than the sum of its proper divisors (683863914).

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

404392086 is a wasteful number, since it uses less digits than its factorization.

404392086 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514 (or 5511 counting only the distinct ones).

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

The square root of 404392086 is about 20109.5023807154. The cubic root of 404392086 is about 739.4932530136.

The spelling of 404392086 in words is "four hundred four million, three hundred ninety-two thousand, eighty-six".