13218858 has 12 divisors (see below), whose sum is σ = 28640898. Its totient is φ = 4406280.

The previous prime is 13218847. The next prime is 13218871. The reversal of 13218858 is 85881231.

It can be written as a sum of positive squares in only one way, i.e., 8277129 + 4941729 = 2877^2 + 2223^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 367173 + ... + 367208.

Almost surely, 2^13218858 is an apocalyptic number.

13218858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

13218858 is an abundant number, since it is smaller than the sum of its proper divisors (15422040).

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

13218858 is a wasteful number, since it uses less digits than its factorization.

13218858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734389 (or 734386 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 13218858 is about 3635.7747454979. The cubic root of 13218858 is about 236.4456412516.

The spelling of 13218858 in words is "thirteen million, two hundred eighteen thousand, eight hundred fifty-eight".