13113240 has 128 divisors (see below), whose sum is σ = 45826560. Its totient is φ = 2939904.

The previous prime is 13113223. The next prime is 13113241. The reversal of 13113240 is 4231131.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13113241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56164 + ... + 56396.

It is an arithmetic number, because the mean of its divisors is an integer number (358020).

Almost surely, 2^13113240 is an apocalyptic number.

13113240 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 13113240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22913280).

13113240 is an abundant number, since it is smaller than the sum of its proper divisors (32713320).

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

13113240 is a wasteful number, since it uses less digits than its factorization.

13113240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321 (or 317 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 13113240 is about 3621.2207886292. The cubic root of 13113240 is about 235.8142270672.

Adding to 13113240 its reverse (4231131), we get a palindrome (17344371).

The spelling of 13113240 in words is "thirteen million, one hundred thirteen thousand, two hundred forty".