13320240 has 40 divisors (see below), whose sum is σ = 41293488. Its totient is φ = 3552000.

The previous prime is 13320233. The next prime is 13320247. The reversal of 13320240 is 4202331.

It is an interprime number because it is at equal distance from previous prime (13320233) and next prime (13320247).

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (13320247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27511 + ... + 27990.

Almost surely, 2^13320240 is an apocalyptic number.

13320240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13320240 is an abundant number, since it is smaller than the sum of its proper divisors (27973248).

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

13320240 is a wasteful number, since it uses less digits than its factorization.

13320240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55517 (or 55511 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 13320240 is about 3649.6903978283. The cubic root of 13320240 is about 237.0485755620.

Adding to 13320240 its reverse (4202331), we get a palindrome (17522571).

The spelling of 13320240 in words is "thirteen million, three hundred twenty thousand, two hundred forty".