404245646 has 16 divisors (see below), whose sum is σ = 711722976. Its totient is φ = 168565536.

The previous prime is 404245643. The next prime is 404245661. The reversal of 404245646 is 646542404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404245643) 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 7 ways as a sum of consecutive naturals, for example, 389681 + ... + 390716.

It is an arithmetic number, because the mean of its divisors is an integer number (44482686).

Almost surely, 2^404245646 is an apocalyptic number.

404245646 is a deficient number, since it is larger than the sum of its proper divisors (307477330).

404245646 is a wasteful number, since it uses less digits than its factorization.

404245646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780443.

The product of its (nonzero) digits is 92160, while the sum is 35.

The square root of 404245646 is about 20105.8609862895. The cubic root of 404245646 is about 739.4039795338.

The spelling of 404245646 in words is "four hundred four million, two hundred forty-five thousand, six hundred forty-six".