28859859 has 24 divisors (see below), whose sum is σ = 48808032. Its totient is φ = 16087680.

The previous prime is 28859851. The next prime is 28859881. The reversal of 28859859 is 95895882.

It is not a de Polignac number, because 28859859 - 2³ = 28859851 is a prime.

It is a super-2 number, since 2×28859859² = 1665782922999762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28859851) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3004 + ... + 8169.

It is an arithmetic number, because the mean of its divisors is an integer number (2033668).

Almost surely, 2^28859859 is an apocalyptic number.

28859859 is a deficient number, since it is larger than the sum of its proper divisors (19948173).

28859859 is a wasteful number, since it uses less digits than its factorization.

28859859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11227 (or 11224 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 54.

The square root of 28859859 is about 5372.1372841728. The cubic root of 28859859 is about 306.7359895004.

The spelling of 28859859 in words is "twenty-eight million, eight hundred fifty-nine thousand, eight hundred fifty-nine".