28678611 has 16 divisors (see below), whose sum is σ = 41277600. Its totient is φ = 17606400.

The previous prime is 28678597. The next prime is 28678633. The reversal of 28678611 is 11687682.

It is not a de Polignac number, because 28678611 - 2⁷ = 28678483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 28678611.

It is not an unprimeable number, because it can be changed into a prime (28678681) 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, 26815 + ... + 27863.

It is an arithmetic number, because the mean of its divisors is an integer number (2579850).

Almost surely, 2^28678611 is an apocalyptic number.

28678611 is a deficient number, since it is larger than the sum of its proper divisors (12598989).

28678611 is a wasteful number, since it uses less digits than its factorization.

28678611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766.

The product of its digits is 32256, while the sum is 39.

The square root of 28678611 is about 5355.2414511392. The cubic root of 28678611 is about 306.0925112231.

The spelling of 28678611 in words is "twenty-eight million, six hundred seventy-eight thousand, six hundred eleven".