28237513187 has 4 divisors (see below), whose sum is σ = 30409629600. Its totient is φ = 26065396776.

The previous prime is 28237513169. The next prime is 28237513211. The reversal of 28237513187 is 78131573282.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28237513187 - 2²⁴ = 28220735971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28237513487) 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, 1086058187 + ... + 1086058212.

It is an arithmetic number, because the mean of its divisors is an integer number (7602407400).

Almost surely, 2^28237513187 is an apocalyptic number.

28237513187 is a deficient number, since it is larger than the sum of its proper divisors (2172116413).

28237513187 is a wasteful number, since it uses less digits than its factorization.

28237513187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2172116412.

The product of its digits is 564480, while the sum is 47.

The spelling of 28237513187 in words is "twenty-eight billion, two hundred thirty-seven million, five hundred thirteen thousand, one hundred eighty-seven".