404640364 has 24 divisors (see below), whose sum is σ = 736298640. Its totient is φ = 194341056.

The previous prime is 404640337. The next prime is 404640371. The reversal of 404640364 is 463046404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13999 + ... + 31705.

It is an arithmetic number, because the mean of its divisors is an integer number (30679110).

Almost surely, 2^404640364 is an apocalyptic number.

It is an amenable number.

404640364 is a deficient number, since it is larger than the sum of its proper divisors (331658276).

404640364 is a wasteful number, since it uses less digits than its factorization.

404640364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17937 (or 17935 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

The square root of 404640364 is about 20115.6745847610. The cubic root of 404640364 is about 739.6445602483.

Adding to 404640364 its reverse (463046404), we get a palindrome (867686768).

The spelling of 404640364 in words is "four hundred four million, six hundred forty thousand, three hundred sixty-four".