28763287 has 16 divisors (see below), whose sum is σ = 33583680. Its totient is φ = 24127488.

The previous prime is 28763279. The next prime is 28763291. The reversal of 28763287 is 78236782.

It is not a de Polignac number, because 28763287 - 2³ = 28763279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28763227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85183 + ... + 85519.

It is an arithmetic number, because the mean of its divisors is an integer number (2098980).

Almost surely, 2^28763287 is an apocalyptic number.

28763287 is a deficient number, since it is larger than the sum of its proper divisors (4820393).

28763287 is a wasteful number, since it uses less digits than its factorization.

28763287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570.

The product of its digits is 225792, while the sum is 43.

The square root of 28763287 is about 5363.1415233984. The cubic root of 28763287 is about 306.3934698040.

The spelling of 28763287 in words is "twenty-eight million, seven hundred sixty-three thousand, two hundred eighty-seven".