13623240 has 64 divisors (see below), whose sum is σ = 41290560. Its totient is φ = 3595520.

The previous prime is 13623223. The next prime is 13623257. The reversal of 13623240 is 4232631.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13623223) and next prime (13623257).

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, 12310 + ... + 13370.

It is an arithmetic number, because the mean of its divisors is an integer number (645165).

Almost surely, 2^13623240 is an apocalyptic number.

13623240 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 13623240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20645280).

13623240 is an abundant number, since it is smaller than the sum of its proper divisors (27667320).

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

13623240 is a wasteful number, since it uses less digits than its factorization.

13623240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1182 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 13623240 is about 3690.9673528765. The cubic root of 13623240 is about 238.8325244904.

Adding to 13623240 its reverse (4232631), we get a palindrome (17855871).

The spelling of 13623240 in words is "thirteen million, six hundred twenty-three thousand, two hundred forty".