404644 has 6 divisors (see below), whose sum is σ = 708134. Its totient is φ = 202320.

The previous prime is 404597. The next prime is 404671. The reversal of 404644 is 446404.

It is a happy number.

404644 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 7744 = 630^2 + 88^2 .

It is a plaindrome in base 13.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50577 + ... + 50584.

2⁴⁰⁴⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

404644 is a deficient number, since it is larger than the sum of its proper divisors (303490).

404644 is a wasteful number, since it uses less digits than its factorization.

404644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101165 (or 101163 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 404644 is about 636.1163415603. The cubic root of 404644 is about 73.9646775664.

The spelling of 404644 in words is "four hundred four thousand, six hundred forty-four".