404639648 has 36 divisors (see below), whose sum is σ = 926700642. Its totient is φ = 173416320.

The previous prime is 404639629. The next prime is 404639689. The reversal of 404639648 is 846936404.

It can be written as a sum of positive squares in only one way, i.e., 238023184 + 166616464 = 15428^2 + 12908^2 .

It is a junction number, because it is equal to n+sod(n) for n = 404639599 and 404639608.

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 5 ways as a sum of consecutive naturals, for example, 127463 + ... + 130598.

Almost surely, 2^404639648 is an apocalyptic number.

It is an amenable number.

404639648 is an abundant number, since it is smaller than the sum of its proper divisors (522060994).

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

404639648 is a wasteful number, since it uses less digits than its factorization.

404639648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258085 (or 258070 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 44.

The square root of 404639648 is about 20115.6567876866. The cubic root of 404639648 is about 739.6441239878.

The spelling of 404639648 in words is "four hundred four million, six hundred thirty-nine thousand, six hundred forty-eight".