404242285 has 8 divisors (see below), whose sum is σ = 485199000. Its totient is φ = 323321664.

The previous prime is 404242259. The next prime is 404242291. The reversal of 404242285 is 582242404.

It can be written as a sum of positive squares in 4 ways, for example, as 272484 + 403969801 = 522^2 + 20099^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 404242285 - 2¹³ = 404234093 is a prime.

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, 36591 + ... + 46339.

It is an arithmetic number, because the mean of its divisors is an integer number (60649875).

Almost surely, 2^404242285 is an apocalyptic number.

It is an amenable number.

404242285 is a deficient number, since it is larger than the sum of its proper divisors (80956715).

404242285 is an equidigital number, since it uses as much as digits as its factorization.

404242285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18047.

The product of its (nonzero) digits is 20480, while the sum is 31.

The square root of 404242285 is about 20105.7774035226. Note that the first 3 decimals coincide. The cubic root of 404242285 is about 739.4019303312.

Adding to 404242285 its reverse (582242404), we get a palindrome (986484689).

The spelling of 404242285 in words is "four hundred four million, two hundred forty-two thousand, two hundred eighty-five".