28858899 has 4 divisors (see below), whose sum is σ = 38478536. Its totient is φ = 19239264.

The previous prime is 28858889. The next prime is 28858901. The reversal of 28858899 is 99885882.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28858899 - 2⁴ = 28858883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28858889) 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, 4809814 + ... + 4809819.

It is an arithmetic number, because the mean of its divisors is an integer number (9619634).

Almost surely, 2^28858899 is an apocalyptic number.

28858899 is a deficient number, since it is larger than the sum of its proper divisors (9619637).

28858899 is an equidigital number, since it uses as much as digits as its factorization.

28858899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9619636.

The product of its digits is 3317760, while the sum is 57.

The square root of 28858899 is about 5372.0479335166. The cubic root of 28858899 is about 306.7325883541.

The spelling of 28858899 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred ninety-nine".