406565604 has 36 divisors (see below), whose sum is σ = 1049577984. Its totient is φ = 132637872.

The previous prime is 406565573. The next prime is 406565609.

It is a happy number.

406565604 is a `hidden beast` number, since 40 + 6 + 5 + 6 + 5 + 604 = 666.

406565604 is nontrivially palindromic in base 10.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (406565609) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 118452 + ... + 121835.

It is an arithmetic number, because the mean of its divisors is an integer number (29154944).

Almost surely, 2^406565604 is an apocalyptic number.

It is an amenable number.

406565604 is an abundant number, since it is smaller than the sum of its proper divisors (643012380).

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

406565604 is a wasteful number, since it uses less digits than its factorization.

406565604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240344 (or 240339 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 36.

The square root of 406565604 is about 20163.4720224469. The cubic root of 406565604 is about 740.8157573265.

The spelling of 406565604 in words is "four hundred six million, five hundred sixty-five thousand, six hundred four".