3218660 has 12 divisors (see below), whose sum is σ = 6759228. Its totient is φ = 1287456.

The previous prime is 3218659. The next prime is 3218669. The reversal of 3218660 is 668123.

It can be written as a sum of positive squares in 2 ways, for example, as 1308736 + 1909924 = 1144^2 + 1382^2 .

It is not an unprimeable number, because it can be changed into a prime (3218669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80447 + ... + 80486.

It is an arithmetic number, because the mean of its divisors is an integer number (563269).

Almost surely, 2^3218660 is an apocalyptic number.

It is an amenable number.

3218660 is an abundant number, since it is smaller than the sum of its proper divisors (3540568).

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

3218660 is a wasteful number, since it uses less digits than its factorization.

3218660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160942 (or 160940 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 3218660 is about 1794.0624292371. The cubic root of 3218660 is about 147.6471384363.

The spelling of 3218660 in words is "three million, two hundred eighteen thousand, six hundred sixty".