13818870 has 128 divisors (see below), whose sum is σ = 41287680. Its totient is φ = 3265920.

The previous prime is 13818869. The next prime is 13818887. The reversal of 13818870 is 7881831.

It is a super-2 number, since 2×13818870² = 381922336153800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 108747 + ... + 108873.

It is an arithmetic number, because the mean of its divisors is an integer number (322560).

Almost surely, 2^13818870 is an apocalyptic number.

13818870 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 13818870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20643840).

13818870 is an abundant number, since it is smaller than the sum of its proper divisors (27468810).

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

13818870 is a wasteful number, since it uses less digits than its factorization.

13818870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 181 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 13818870 is about 3717.3740731866. The cubic root of 13818870 is about 239.9703088270.

The spelling of 13818870 in words is "thirteen million, eight hundred eighteen thousand, eight hundred seventy".