13237728 has 48 divisors (see below), whose sum is σ = 39715200. Its totient is φ = 3782016.

The previous prime is 13237727. The next prime is 13237733. The reversal of 13237728 is 82773231.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13237727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9178 + ... + 10521.

It is an arithmetic number, because the mean of its divisors is an integer number (827400).

Almost surely, 2^13237728 is an apocalyptic number.

It is an amenable number.

13237728 is an abundant number, since it is smaller than the sum of its proper divisors (26477472).

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

13237728 is a wasteful number, since it uses less digits than its factorization.

13237728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19719 (or 19711 counting only the distinct ones).

The product of its digits is 14112, while the sum is 33.

The square root of 13237728 is about 3638.3688653021. The cubic root of 13237728 is about 236.5580969540.

The spelling of 13237728 in words is "thirteen million, two hundred thirty-seven thousand, seven hundred twenty-eight".