13187028 has 24 divisors (see below), whose sum is σ = 31763200. Its totient is φ = 4253760.

The previous prime is 13187023. The next prime is 13187033. The reversal of 13187028 is 82078131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13187023) and next prime (13187033).

It is a junction number, because it is equal to n+sod(n) for n = 13186986 and 13187004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13187023) 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, 17353 + ... + 18096.

Almost surely, 2^13187028 is an apocalyptic number.

It is an amenable number.

13187028 is an abundant number, since it is smaller than the sum of its proper divisors (18576172).

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

13187028 is a wasteful number, since it uses less digits than its factorization.

13187028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35487 (or 35485 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 13187028 is about 3631.3947733619. The cubic root of 13187028 is about 236.2557077090.

The spelling of 13187028 in words is "thirteen million, one hundred eighty-seven thousand, twenty-eight".