404709644 has 6 divisors (see below), whose sum is σ = 708241884. Its totient is φ = 202354820.

The previous prime is 404709623. The next prime is 404709659. The reversal of 404709644 is 446907404.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 404709598 and 404709607.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50588702 + ... + 50588709.

It is an arithmetic number, because the mean of its divisors is an integer number (118040314).

Almost surely, 2^404709644 is an apocalyptic number.

It is an amenable number.

404709644 is a deficient number, since it is larger than the sum of its proper divisors (303532240).

404709644 is a wasteful number, since it uses less digits than its factorization.

404709644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101177415 (or 101177413 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 404709644 is about 20117.3965512439. The cubic root of 404709644 is about 739.6867702826.

The spelling of 404709644 in words is "four hundred four million, seven hundred nine thousand, six hundred forty-four".