404490085 has 8 divisors (see below), whose sum is σ = 493345656. Its totient is φ = 318287040.

The previous prime is 404490049. The next prime is 404490091. The reversal of 404490085 is 580094404.

It can be written as a sum of positive squares in 4 ways, for example, as 21818241 + 382671844 = 4671^2 + 19562^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 404490085 - 2²¹ = 402392933 is a prime.

It is a super-2 number, since 2×404490085² = 327224457726614450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 404490085.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 662794 + ... + 663403.

It is an arithmetic number, because the mean of its divisors is an integer number (61668207).

Almost surely, 2^404490085 is an apocalyptic number.

It is an amenable number.

404490085 is a deficient number, since it is larger than the sum of its proper divisors (88855571).

404490085 is a wasteful number, since it uses less digits than its factorization.

404490085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326263.

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 404490085 is about 20111.9388672500. The cubic root of 404490085 is about 739.5529836138.

The spelling of 404490085 in words is "four hundred four million, four hundred ninety thousand, eighty-five".