28206858 has 8 divisors (see below), whose sum is σ = 56413728. Its totient is φ = 9402284.

The previous prime is 28206797. The next prime is 28206877. The reversal of 28206858 is 85860282.

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

28206858 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2350566 + ... + 2350577.

It is an arithmetic number, because the mean of its divisors is an integer number (7051716).

Almost surely, 2^28206858 is an apocalyptic number.

28206858 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28206858 is a wasteful number, since it uses less digits than its factorization.

28206858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4701148.

The product of its (nonzero) digits is 61440, while the sum is 39.

The square root of 28206858 is about 5311.0128977437. The cubic root of 28206858 is about 304.4048521614.

The spelling of 28206858 in words is "twenty-eight million, two hundred six thousand, eight hundred fifty-eight".