13944224 has 36 divisors (see below), whose sum is σ = 31938354. Its totient is φ = 5975424.

The previous prime is 13944221. The next prime is 13944257. The reversal of 13944224 is 42244931.

It can be written as a sum of positive squares in only one way, i.e., 13454224 + 490000 = 3668^2 + 700^2 .

It is not an unprimeable number, because it can be changed into a prime (13944221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2879 + ... + 6014.

Almost surely, 2^13944224 is an apocalyptic number.

13944224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

13944224 is an abundant number, since it is smaller than the sum of its proper divisors (17994130).

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

13944224 is an equidigital number, since it uses as much as digits as its factorization.

13944224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8917 (or 8902 counting only the distinct ones).

The product of its digits is 6912, while the sum is 29.

The square root of 13944224 is about 3734.1965668668. The cubic root of 13944224 is about 240.6937335327.

The spelling of 13944224 in words is "thirteen million, nine hundred forty-four thousand, two hundred twenty-four".