28860286 has 16 divisors (see below), whose sum is σ = 53280864. Its totient is φ = 11417184.

The previous prime is 28860253. The next prime is 28860289. The reversal of 28860286 is 68206882.

It is a super-2 number, since 2×28860286² = 1665832216003592, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28860289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79105 + ... + 79468.

It is an arithmetic number, because the mean of its divisors is an integer number (3330054).

Almost surely, 2^28860286 is an apocalyptic number.

28860286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28860286 is a deficient number, since it is larger than the sum of its proper divisors (24420578).

28860286 is a wasteful number, since it uses less digits than its factorization.

28860286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158595.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 28860286 is about 5372.1770261227. The cubic root of 28860286 is about 306.7375022778.

The spelling of 28860286 in words is "twenty-eight million, eight hundred sixty thousand, two hundred eighty-six".