13218290 has 16 divisors (see below), whose sum is σ = 23855040. Its totient is φ = 5273520.

The previous prime is 13218269. The next prime is 13218311. The reversal of 13218290 is 9281231.

It is an interprime number because it is at equal distance from previous prime (13218269) and next prime (13218311).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2885 + ... + 5895.

It is an arithmetic number, because the mean of its divisors is an integer number (1490940).

Almost surely, 2^13218290 is an apocalyptic number.

13218290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13218290 is a deficient number, since it is larger than the sum of its proper divisors (10636750).

13218290 is a wasteful number, since it uses less digits than its factorization.

13218290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3457.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 13218290 is about 3635.6966320088. The cubic root of 13218290 is about 236.4422545987.

The spelling of 13218290 in words is "thirteen million, two hundred eighteen thousand, two hundred ninety".