13728988 has 24 divisors (see below), whose sum is σ = 29570912. Its totient is φ = 5431104.

The previous prime is 13728971. The next prime is 13728989. The reversal of 13728988 is 88982731.

It is a super-2 number, since 2×13728988² = 376970223008288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13728989) 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, 18495 + ... + 19222.

Almost surely, 2^13728988 is an apocalyptic number.

It is an amenable number.

13728988 is an abundant number, since it is smaller than the sum of its proper divisors (15841924).

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

13728988 is a wasteful number, since it uses less digits than its factorization.

13728988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37741 (or 37739 counting only the distinct ones).

The product of its digits is 193536, while the sum is 46.

The square root of 13728988 is about 3705.2649028106. The cubic root of 13728988 is about 239.4488975309.

The spelling of 13728988 in words is "thirteen million, seven hundred twenty-eight thousand, nine hundred eighty-eight".