28828879 has 4 divisors (see below), whose sum is σ = 28864080. Its totient is φ = 28793680.

The previous prime is 28828861. The next prime is 28828901. The reversal of 28828879 is 97882882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97882882 = 2 ⋅48941441.

It is a cyclic number.

It is not a de Polignac number, because 28828879 - 2⁵ = 28828847 is a prime.

It is a super-2 number, since 2×28828879² = 1662208528793282, 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 (28828819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16342 + ... + 18019.

It is an arithmetic number, because the mean of its divisors is an integer number (7216020).

Almost surely, 2^28828879 is an apocalyptic number.

28828879 is a deficient number, since it is larger than the sum of its proper divisors (35201).

28828879 is an equidigital number, since it uses as much as digits as its factorization.

28828879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35200.

The product of its digits is 1032192, while the sum is 52.

The square root of 28828879 is about 5369.2531137953. The cubic root of 28828879 is about 306.6261935928.

The spelling of 28828879 in words is "twenty-eight million, eight hundred twenty-eight thousand, eight hundred seventy-nine".