404245885 has 4 divisors (see below), whose sum is σ = 485095068. Its totient is φ = 323396704.

The previous prime is 404245871. The next prime is 404245889. The reversal of 404245885 is 588542404.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 77757124 + 326488761 = 8818^2 + 18069^2 .

It is a cyclic number.

It is not a de Polignac number, because 404245885 - 2¹³ = 404237693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404245889) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40424584 + ... + 40424593.

It is an arithmetic number, because the mean of its divisors is an integer number (121273767).

Almost surely, 2^404245885 is an apocalyptic number.

It is an amenable number.

404245885 is a deficient number, since it is larger than the sum of its proper divisors (80849183).

404245885 is an equidigital number, since it uses as much as digits as its factorization.

404245885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80849182.

The product of its (nonzero) digits is 204800, while the sum is 40.

The square root of 404245885 is about 20105.8669298292. The cubic root of 404245885 is about 739.4041252517.

The spelling of 404245885 in words is "four hundred four million, two hundred forty-five thousand, eight hundred eighty-five".