13223240 has 64 divisors (see below), whose sum is σ = 31795200. Its totient is φ = 4935168.

The previous prime is 13223239. The next prime is 13223269. The reversal of 13223240 is 4232231.

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, 96452 + ... + 96588.

It is an arithmetic number, because the mean of its divisors is an integer number (496800).

Almost surely, 2^13223240 is an apocalyptic number.

13223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13223240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15897600).

13223240 is an abundant number, since it is smaller than the sum of its proper divisors (18571960).

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

13223240 is a wasteful number, since it uses less digits than its factorization.

13223240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294 (or 290 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 13223240 is about 3636.3773181561. The cubic root of 13223240 is about 236.4717653018.

Adding to 13223240 its reverse (4232231), we get a palindrome (17455471).

The spelling of 13223240 in words is "thirteen million, two hundred twenty-three thousand, two hundred forty".