13587428 has 12 divisors (see below), whose sum is σ = 24598140. Its totient is φ = 6559392.

The previous prime is 13587421. The next prime is 13587439. The reversal of 13587428 is 82478531.

It can be written as a sum of positive squares in 2 ways, for example, as 11343424 + 2244004 = 3368^2 + 1498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13587391 and 13587400.

It is not an unprimeable number, because it can be changed into a prime (13587421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58451 + ... + 58682.

It is an arithmetic number, because the mean of its divisors is an integer number (2049845).

Almost surely, 2^13587428 is an apocalyptic number.

It is an amenable number.

13587428 is a deficient number, since it is larger than the sum of its proper divisors (11010712).

13587428 is a wasteful number, since it uses less digits than its factorization.

13587428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117166 (or 117164 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 13587428 is about 3686.1128577405. The cubic root of 13587428 is about 238.6230643830.

The spelling of 13587428 in words is "thirteen million, five hundred eighty-seven thousand, four hundred twenty-eight".