28287183 has 8 divisors (see below), whose sum is σ = 37948288. Its totient is φ = 18742104.

The previous prime is 28287179. The next prime is 28287187. The reversal of 28287183 is 38178282.

It is an interprime number because it is at equal distance from previous prime (28287179) and next prime (28287187).

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

It is not a de Polignac number, because 28287183 - 2² = 28287179 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 (28287187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28435 + ... + 29412.

It is an arithmetic number, because the mean of its divisors is an integer number (4743536).

Almost surely, 2^28287183 is an apocalyptic number.

28287183 is a deficient number, since it is larger than the sum of its proper divisors (9661105).

28287183 is a wasteful number, since it uses less digits than its factorization.

28287183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58013.

The product of its digits is 43008, while the sum is 39.

The square root of 28287183 is about 5318.5696385400. The cubic root of 28287183 is about 304.6935307314.

It can be divided in two parts, 2828 and 7183, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 28287183 in words is "twenty-eight million, two hundred eighty-seven thousand, one hundred eighty-three".