404233640 has 16 divisors (see below), whose sum is σ = 909525780. Its totient is φ = 161693440.

The previous prime is 404233591. The next prime is 404233649. The reversal of 404233640 is 46332404.

It can be written as a sum of positive squares in 2 ways, for example, as 354418276 + 49815364 = 18826^2 + 7058^2 .

It is not an unprimeable number, because it can be changed into a prime (404233649) 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, 5052881 + ... + 5052960.

Almost surely, 2^404233640 is an apocalyptic number.

404233640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

404233640 is an abundant number, since it is smaller than the sum of its proper divisors (505292140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

404233640 is a wasteful number, since it uses less digits than its factorization.

404233640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105852 (or 10105848 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 404233640 is about 20105.5624144166. The cubic root of 404233640 is about 739.3966594202.

The spelling of 404233640 in words is "four hundred four million, two hundred thirty-three thousand, six hundred forty".