404556481 has 4 divisors (see below), whose sum is σ = 462350272. Its totient is φ = 346762692.

The previous prime is 404556461. The next prime is 404556487. The reversal of 404556481 is 184655404.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 404556481 - 2²⁷ = 270338753 is a prime.

It is a super-2 number, since 2×404556481² = 327331892638206722, 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 404556481.

It is not an unprimeable number, because it can be changed into a prime (404556487) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 28896885 + ... + 28896898.

It is an arithmetic number, because the mean of its divisors is an integer number (115587568).

Almost surely, 2^404556481 is an apocalyptic number.

It is an amenable number.

404556481 is a deficient number, since it is larger than the sum of its proper divisors (57793791).

404556481 is an equidigital number, since it uses as much as digits as its factorization.

404556481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57793790.

The product of its (nonzero) digits is 76800, while the sum is 37.

The square root of 404556481 is about 20113.5894608595. The cubic root of 404556481 is about 739.5934466357.

The spelling of 404556481 in words is "four hundred four million, five hundred fifty-six thousand, four hundred eighty-one".