13623720 has 64 divisors (see below), whose sum is σ = 44591040. Its totient is φ = 3302400.

The previous prime is 13623697. The next prime is 13623721. The reversal of 13623720 is 2732631.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13623721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3841 + ... + 6480.

It is an arithmetic number, because the mean of its divisors is an integer number (696735).

Almost surely, 2^13623720 is an apocalyptic number.

13623720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13623720 is an abundant number, since it is smaller than the sum of its proper divisors (30967320).

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

13623720 is a wasteful number, since it uses less digits than its factorization.

13623720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10346 (or 10342 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 13623720 is about 3691.0323759079. The cubic root of 13623720 is about 238.8353294586.

The spelling of 13623720 in words is "thirteen million, six hundred twenty-three thousand, seven hundred twenty".