404002064 has 20 divisors (see below), whose sum is σ = 783087900. Its totient is φ = 201914880.

The previous prime is 404002043. The next prime is 404002091. The reversal of 404002064 is 460200404.

It can be written as a sum of positive squares in 2 ways, for example, as 795664 + 403206400 = 892^2 + 20080^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51524 + ... + 58844.

It is an arithmetic number, because the mean of its divisors is an integer number (39154395).

Almost surely, 2^404002064 is an apocalyptic number.

It is an amenable number.

404002064 is a deficient number, since it is larger than the sum of its proper divisors (379085836).

404002064 is a wasteful number, since it uses less digits than its factorization.

404002064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10778 (or 10772 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 404002064 is about 20099.8025860952. The cubic root of 404002064 is about 739.2554380971.

Adding to 404002064 its reverse (460200404), we get a palindrome (864202468).

The spelling of 404002064 in words is "four hundred four million, two thousand, sixty-four".