28875679 has 4 divisors (see below), whose sum is σ = 33000784. Its totient is φ = 24750576.

The previous prime is 28875659. The next prime is 28875683. The reversal of 28875679 is 97657882.

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 28875679 - 2⁵ = 28875647 is a prime.

It is a super-2 number, since 2×28875679² = 1667609675422082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28875659) 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, 2062542 + ... + 2062555.

It is an arithmetic number, because the mean of its divisors is an integer number (8250196).

Almost surely, 2^28875679 is an apocalyptic number.

28875679 is a deficient number, since it is larger than the sum of its proper divisors (4125105).

28875679 is an equidigital number, since it uses as much as digits as its factorization.

28875679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4125104.

The product of its digits is 1693440, while the sum is 52.

The square root of 28875679 is about 5373.6094945576. The cubic root of 28875679 is about 306.7920266991.

The spelling of 28875679 in words is "twenty-eight million, eight hundred seventy-five thousand, six hundred seventy-nine".