13312240 has 20 divisors (see below), whose sum is σ = 30951144. Its totient is φ = 5324864.

The previous prime is 13312231. The next prime is 13312253. The reversal of 13312240 is 4221331.

It is a happy number.

13312240 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83122 + ... + 83281.

Almost surely, 2^13312240 is an apocalyptic number.

13312240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13312240 is an abundant number, since it is smaller than the sum of its proper divisors (17638904).

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

13312240 is a wasteful number, since it uses less digits than its factorization.

13312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166416 (or 166410 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 13312240 is about 3648.5942498447. The cubic root of 13312240 is about 237.0011097410.

Adding to 13312240 its reverse (4221331), we get a palindrome (17533571).

Subtracting from 13312240 its reverse (4221331), we obtain a palindrome (9090909).

The spelling of 13312240 in words is "thirteen million, three hundred twelve thousand, two hundred forty".