406664404 has 12 divisors (see below), whose sum is σ = 729020628. Its totient is φ = 198372800.

The previous prime is 406664381. The next prime is 406664413. The reversal of 406664404 is 404466604.

It can be written as a sum of positive squares in 2 ways, for example, as 27583504 + 379080900 = 5252^2 + 19470^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 406664404.

It is a congruent number.

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, 1239667 + ... + 1239994.

It is an arithmetic number, because the mean of its divisors is an integer number (60751719).

Almost surely, 2^406664404 is an apocalyptic number.

It is an amenable number.

406664404 is a deficient number, since it is larger than the sum of its proper divisors (322356224).

406664404 is a wasteful number, since it uses less digits than its factorization.

406664404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2479706 (or 2479704 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 406664404 is about 20165.9218485047. The cubic root of 406664404 is about 740.8757613111.

The spelling of 406664404 in words is "four hundred six million, six hundred sixty-four thousand, four hundred four".