404490146 has 16 divisors (see below), whose sum is σ = 652960440. Its totient is φ = 187226880.

The previous prime is 404490109. The next prime is 404490157. The reversal of 404490146 is 641094404.

It can be written as a sum of positive squares in 4 ways, for example, as 235776025 + 168714121 = 15355^2 + 12989^2 .

It is a super-2 number, since 2×404490146² = 327224556422202632, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 95441 + ... + 99588.

Almost surely, 2^404490146 is an apocalyptic number.

404490146 is a deficient number, since it is larger than the sum of its proper divisors (248470294).

404490146 is a wasteful number, since it uses less digits than its factorization.

404490146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195109.

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 404490146 is about 20111.9403837621. The cubic root of 404490146 is about 739.5530207905.

The spelling of 404490146 in words is "four hundred four million, four hundred ninety thousand, one hundred forty-six".