406502660 has 12 divisors (see below), whose sum is σ = 853655628. Its totient is φ = 162601056.

The previous prime is 406502639. The next prime is 406502669. The reversal of 406502660 is 66205604.

It can be written as a sum of positive squares in 2 ways, for example, as 93354244 + 313148416 = 9662^2 + 17696^2 .

It is not an unprimeable number, because it can be changed into a prime (406502669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10162547 + ... + 10162586.

It is an arithmetic number, because the mean of its divisors is an integer number (71137969).

Almost surely, 2^406502660 is an apocalyptic number.

It is an amenable number.

406502660 is an abundant number, since it is smaller than the sum of its proper divisors (447152968).

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

406502660 is a wasteful number, since it uses less digits than its factorization.

406502660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20325142 (or 20325140 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 406502660 is about 20161.9111197327. The cubic root of 406502660 is about 740.7775246172. Note that the first 3 decimals are identical.

The spelling of 406502660 in words is "four hundred six million, five hundred two thousand, six hundred sixty".