406665012 has 48 divisors (see below), whose sum is σ = 1031838080. Its totient is φ = 123907968.

The previous prime is 406664989. The next prime is 406665023. The reversal of 406665012 is 210566604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3414 + ... + 28722.

Almost surely, 2^406665012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 406665012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515919040).

406665012 is an abundant number, since it is smaller than the sum of its proper divisors (625173068).

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

406665012 is a wasteful number, since it uses less digits than its factorization.

406665012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25432 (or 25430 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 406665012 is about 20165.9369234360. The cubic root of 406665012 is about 740.8761305363.

The spelling of 406665012 in words is "four hundred six million, six hundred sixty-five thousand, twelve".