28674187 has 4 divisors (see below), whose sum is σ = 28900096. Its totient is φ = 28448280.

The previous prime is 28674179. The next prime is 28674193. The reversal of 28674187 is 78147682.

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 28674187 - 2³ = 28674179 is a prime.

It is a super-2 number, since 2×28674187² = 1644418000221938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28674137) 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, 112764 + ... + 113017.

It is an arithmetic number, because the mean of its divisors is an integer number (7225024).

Almost surely, 2^28674187 is an apocalyptic number.

28674187 is a deficient number, since it is larger than the sum of its proper divisors (225909).

28674187 is a wasteful number, since it uses less digits than its factorization.

28674187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225908.

The product of its digits is 150528, while the sum is 43.

The square root of 28674187 is about 5354.8283819372. The cubic root of 28674187 is about 306.0767710035.

The spelling of 28674187 in words is "twenty-eight million, six hundred seventy-four thousand, one hundred eighty-seven".