404490395 has 4 divisors (see below), whose sum is σ = 485388480. Its totient is φ = 323592312.

The previous prime is 404490391. The next prime is 404490407. The reversal of 404490395 is 593094404.

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

It is a cyclic number.

It is not a de Polignac number, because 404490395 - 2² = 404490391 is a prime.

It is a super-2 number, since 2×404490395² = 327224959294512050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (404490391) 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, 40449035 + ... + 40449044.

It is an arithmetic number, because the mean of its divisors is an integer number (121347120).

Almost surely, 2^404490395 is an apocalyptic number.

404490395 is a deficient number, since it is larger than the sum of its proper divisors (80898085).

404490395 is an equidigital number, since it uses as much as digits as its factorization.

404490395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80898084.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 404490395 is about 20111.9465741136. The cubic root of 404490395 is about 739.5531725442.

The spelling of 404490395 in words is "four hundred four million, four hundred ninety thousand, three hundred ninety-five".