13724920 has 32 divisors (see below), whose sum is σ = 33689520. Its totient is φ = 4990720.

The previous prime is 13724903. The next prime is 13724927. The reversal of 13724920 is 2942731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13724927) 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 7 ways as a sum of consecutive naturals, for example, 15157 + ... + 16036.

Almost surely, 2^13724920 is an apocalyptic number.

13724920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13724920 is an abundant number, since it is smaller than the sum of its proper divisors (19964600).

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

13724920 is a wasteful number, since it uses less digits than its factorization.

13724920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31215 (or 31211 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 13724920 is about 3704.7159135351. The cubic root of 13724920 is about 239.4252450389.

The spelling of 13724920 in words is "thirteen million, seven hundred twenty-four thousand, nine hundred twenty".