28236887 has 12 divisors (see below), whose sum is σ = 33046776. Its totient is φ = 24055920.

The previous prime is 28236851. The next prime is 28236889. The reversal of 28236887 is 78863282.

It is not a de Polignac number, because 28236887 - 2⁸ = 28236631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28236889) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6812 + ... + 10142.

It is an arithmetic number, because the mean of its divisors is an integer number (2753898).

Almost surely, 2^28236887 is an apocalyptic number.

28236887 is a deficient number, since it is larger than the sum of its proper divisors (4809889).

28236887 is a wasteful number, since it uses less digits than its factorization.

28236887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518 (or 3511 counting only the distinct ones).

The product of its digits is 258048, while the sum is 44.

The square root of 28236887 is about 5313.8391959110. The cubic root of 28236887 is about 304.5128369098.

The spelling of 28236887 in words is "twenty-eight million, two hundred thirty-six thousand, eight hundred eighty-seven".