13620024 has 96 divisors (see below), whose sum is σ = 41698800. Its totient is φ = 3978240.

The previous prime is 13620023. The next prime is 13620037. The reversal of 13620024 is 42002631.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 13619979 and 13620006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13620023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22672 + ... + 23264.

Almost surely, 2^13620024 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13620024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20849400).

13620024 is an abundant number, since it is smaller than the sum of its proper divisors (28078776).

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

13620024 is a wasteful number, since it uses less digits than its factorization.

13620024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 13620024 is about 3690.5316690146. The cubic root of 13620024 is about 238.8137295036.

Adding to 13620024 its reverse (42002631), we get a palindrome (55622655).

The spelling of 13620024 in words is "thirteen million, six hundred twenty thousand, twenty-four".