28640183 has 16 divisors (see below), whose sum is σ = 34562976. Its totient is φ = 23379840.

The previous prime is 28640177. The next prime is 28640191. The reversal of 28640183 is 38104682.

It is not a de Polignac number, because 28640183 - 2⁴ = 28640167 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28640483) 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, 2585 + ... + 7997.

It is an arithmetic number, because the mean of its divisors is an integer number (2160186).

Almost surely, 2^28640183 is an apocalyptic number.

28640183 is a deficient number, since it is larger than the sum of its proper divisors (5922793).

28640183 is a wasteful number, since it uses less digits than its factorization.

28640183 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28640183 is about 5351.6523616543. The cubic root of 28640183 is about 305.9557335542.

The spelling of 28640183 in words is "twenty-eight million, six hundred forty thousand, one hundred eighty-three".