28316189 has 16 divisors (see below), whose sum is σ = 31648320. Its totient is φ = 25119360.

The previous prime is 28316173. The next prime is 28316191. The reversal of 28316189 is 98161382.

It is a cyclic number.

It is not a de Polignac number, because 28316189 - 2⁴ = 28316173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28316689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143639 + ... + 143835.

It is an arithmetic number, because the mean of its divisors is an integer number (1978020).

Almost surely, 2^28316189 is an apocalyptic number.

It is an amenable number.

28316189 is a deficient number, since it is larger than the sum of its proper divisors (3332131).

28316189 is a wasteful number, since it uses less digits than its factorization.

28316189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460.

The product of its digits is 20736, while the sum is 38.

The square root of 28316189 is about 5321.2958008365. The cubic root of 28316189 is about 304.7976405613.

The spelling of 28316189 in words is "twenty-eight million, three hundred sixteen thousand, one hundred eighty-nine".