13870224 has 80 divisors (see below), whose sum is σ = 40344640. Its totient is φ = 4561920.

The previous prime is 13870201. The next prime is 13870231. The reversal of 13870224 is 42207831.

It is a super-2 number, since 2×13870224² = 384766227620352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 41739 + ... + 42069.

It is an arithmetic number, because the mean of its divisors is an integer number (504308).

Almost surely, 2^13870224 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13870224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20172320).

13870224 is an abundant number, since it is smaller than the sum of its proper divisors (26474416).

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

13870224 is a wasteful number, since it uses less digits than its factorization.

13870224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 13870224 is about 3724.2749629962. The cubic root of 13870224 is about 240.2672024016.

The spelling of 13870224 in words is "thirteen million, eight hundred seventy thousand, two hundred twenty-four".