28609187 has 8 divisors (see below), whose sum is σ = 29890560. Its totient is φ = 27350280.

The previous prime is 28609169. The next prime is 28609213. The reversal of 28609187 is 78190682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28609187 - 2⁶ = 28609123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28609127) 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, 2987 + ... + 8132.

It is an arithmetic number, because the mean of its divisors is an integer number (3736320).

Almost surely, 2^28609187 is an apocalyptic number.

28609187 is a deficient number, since it is larger than the sum of its proper divisors (1281373).

28609187 is a wasteful number, since it uses less digits than its factorization.

28609187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11233.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28609187 is about 5348.7556496815. The cubic root of 28609187 is about 305.8453196050.

The spelling of 28609187 in words is "twenty-eight million, six hundred nine thousand, one hundred eighty-seven".