28763285 has 8 divisors (see below), whose sum is σ = 34858296. Its totient is φ = 22782400.

The previous prime is 28763279. The next prime is 28763291. The reversal of 28763285 is 58236782.

It is an interprime number because it is at equal distance from previous prime (28763279) and next prime (28763291).

It can be written as a sum of positive squares in 4 ways, for example, as 4072324 + 24690961 = 2018^2 + 4969^2 .

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

It is not a de Polignac number, because 28763285 - 2¹⁸ = 28501141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27974 + ... + 28983.

It is an arithmetic number, because the mean of its divisors is an integer number (4357287).

Almost surely, 2^28763285 is an apocalyptic number.

It is an amenable number.

28763285 is a deficient number, since it is larger than the sum of its proper divisors (6095011).

28763285 is a wasteful number, since it uses less digits than its factorization.

28763285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57063.

The product of its digits is 161280, while the sum is 41.

The square root of 28763285 is about 5363.1413369405. The cubic root of 28763285 is about 306.3934627025.

The spelling of 28763285 in words is "twenty-eight million, seven hundred sixty-three thousand, two hundred eighty-five".