404402245 has 32 divisors (see below), whose sum is σ = 549652320. Its totient is φ = 283530240.

The previous prime is 404402237. The next prime is 404402263. The reversal of 404402245 is 542204404.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 151019521 + 253382724 = 12289^2 + 15918^2 .

It is not a de Polignac number, because 404402245 - 2³ = 404402237 is a prime.

It is a super-2 number, since 2×404402245² = 327082351522080050, which contains 22 as substring.

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 31 ways as a sum of consecutive naturals, for example, 113227 + ... + 116743.

It is an arithmetic number, because the mean of its divisors is an integer number (17176635).

Almost surely, 2^404402245 is an apocalyptic number.

It is an amenable number.

404402245 is a deficient number, since it is larger than the sum of its proper divisors (145250075).

404402245 is a wasteful number, since it uses less digits than its factorization.

404402245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3625.

The product of its (nonzero) digits is 5120, while the sum is 25.

The square root of 404402245 is about 20109.7549711577. The cubic root of 404402245 is about 739.4994453941.

Adding to 404402245 its reverse (542204404), we get a palindrome (946606649).

The spelling of 404402245 in words is "four hundred four million, four hundred two thousand, two hundred forty-five".