13891224 has 32 divisors (see below), whose sum is σ = 35850240. Its totient is φ = 4480800.

The previous prime is 13891217. The next prime is 13891231. The reversal of 13891224 is 42219831.

It is an interprime number because it is at equal distance from previous prime (13891217) and next prime (13891231).

It is a super-2 number, since 2×13891224² = 385932208436352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13891191 and 13891200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8592 + ... + 10079.

It is an arithmetic number, because the mean of its divisors is an integer number (1120320).

Almost surely, 2^13891224 is an apocalyptic number.

It is an amenable number.

13891224 is an abundant number, since it is smaller than the sum of its proper divisors (21959016).

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

13891224 is a wasteful number, since it uses less digits than its factorization.

13891224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18711 (or 18707 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 13891224 is about 3727.0932373634. The cubic root of 13891224 is about 240.3883988817.

The spelling of 13891224 in words is "thirteen million, eight hundred ninety-one thousand, two hundred twenty-four".