28518879 has 8 divisors (see below), whose sum is σ = 38303280. Its totient is φ = 18873536.

The previous prime is 28518863. The next prime is 28518881. The reversal of 28518879 is 97881582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28518879 - 2⁴ = 28518863 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28518859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34284 + ... + 35105.

It is an arithmetic number, because the mean of its divisors is an integer number (4787910).

Almost surely, 2^28518879 is an apocalyptic number.

28518879 is a deficient number, since it is larger than the sum of its proper divisors (9784401).

28518879 is a wasteful number, since it uses less digits than its factorization.

28518879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69529.

The product of its digits is 322560, while the sum is 48.

The square root of 28518879 is about 5340.3070136463. The cubic root of 28518879 is about 305.5231690976.

The spelling of 28518879 in words is "twenty-eight million, five hundred eighteen thousand, eight hundred seventy-nine".