28851986 has 8 divisors (see below), whose sum is σ = 43887744. Its totient is φ = 14222740.

The previous prime is 28851983. The next prime is 28851997. The reversal of 28851986 is 68915882.

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

It is a super-2 number, since 2×28851986² = 1664874192288392, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28851986.

It is not an unprimeable number, because it can be changed into a prime (28851983) by changing a digit.

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, 101450 + ... + 101733.

It is an arithmetic number, because the mean of its divisors is an integer number (5485968).

Almost surely, 2^28851986 is an apocalyptic number.

28851986 is a deficient number, since it is larger than the sum of its proper divisors (15035758).

28851986 is a wasteful number, since it uses less digits than its factorization.

28851986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203256.

The product of its digits is 276480, while the sum is 47.

The square root of 28851986 is about 5371.4044718304. The cubic root of 28851986 is about 306.7080943298.

The spelling of 28851986 in words is "twenty-eight million, eight hundred fifty-one thousand, nine hundred eighty-six".