13218870 has 64 divisors (see below), whose sum is σ = 38177280. Its totient is φ = 2861568.

The previous prime is 13218847. The next prime is 13218871. The reversal of 13218870 is 7881231.

It is a happy number.

13218870 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×13218870³ (a number of 22 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13218871) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2334 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (596520).

Almost surely, 2^13218870 is an apocalyptic number.

13218870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13218870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19088640).

13218870 is an abundant number, since it is smaller than the sum of its proper divisors (24958410).

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

13218870 is a wasteful number, since it uses less digits than its factorization.

13218870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3349.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13218870 is about 3635.7763957647. The cubic root of 13218870 is about 236.4457127995.

The spelling of 13218870 in words is "thirteen million, two hundred eighteen thousand, eight hundred seventy".