404456660 has 24 divisors (see below), whose sum is σ = 852504576. Its totient is φ = 161183520.

The previous prime is 404456653. The next prime is 404456669. The reversal of 404456660 is 66654404.

It is a self number, because there is not a number n which added to its sum of digits gives 404456660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404456669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31892 + ... + 42731.

It is an arithmetic number, because the mean of its divisors is an integer number (35521024).

Almost surely, 2^404456660 is an apocalyptic number.

It is an amenable number.

404456660 is an abundant number, since it is smaller than the sum of its proper divisors (448047916).

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

404456660 is a wasteful number, since it uses less digits than its factorization.

404456660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74903 (or 74901 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 35.

The square root of 404456660 is about 20111.1078759973. The cubic root of 404456660 is about 739.5326120890.

The spelling of 404456660 in words is "four hundred four million, four hundred fifty-six thousand, six hundred sixty".