136669218 has 32 divisors (see below), whose sum is σ = 312833664. Its totient is φ = 38992512.

The previous prime is 136669187. The next prime is 136669229. The reversal of 136669218 is 812966631.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 136669218.

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, 34096 + ... + 37892.

It is an arithmetic number, because the mean of its divisors is an integer number (9776052).

Almost surely, 2^136669218 is an apocalyptic number.

136669218 is an abundant number, since it is smaller than the sum of its proper divisors (176164446).

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

136669218 is a wasteful number, since it uses less digits than its factorization.

136669218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4666.

The product of its digits is 93312, while the sum is 42.

The square root of 136669218 is about 11690.5610643801. The cubic root of 136669218 is about 515.0984422366.

The spelling of 136669218 in words is "one hundred thirty-six million, six hundred sixty-nine thousand, two hundred eighteen".