13537720 has 48 divisors (see below), whose sum is σ = 35438040. Its totient is φ = 4640832.

The previous prime is 13537717. The next prime is 13537721. The reversal of 13537720 is 2773531.

13537720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13537721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1494 + ... + 5413.

Almost surely, 2^13537720 is an apocalyptic number.

13537720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13537720 is an abundant number, since it is smaller than the sum of its proper divisors (21900320).

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

13537720 is a wasteful number, since it uses less digits than its factorization.

13537720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6932 (or 6921 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 28.

The square root of 13537720 is about 3679.3640754891. The cubic root of 13537720 is about 238.3317173781.

The spelling of 13537720 in words is "thirteen million, five hundred thirty-seven thousand, seven hundred twenty".