28863385 has 8 divisors (see below), whose sum is σ = 35481096. Its totient is φ = 22527360.

The previous prime is 28863383. The next prime is 28863391. The reversal of 28863385 is 58336882.

It can be written as a sum of positive squares in 4 ways, for example, as 47961 + 28815424 = 219^2 + 5368^2 .

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

It is not a de Polignac number, because 28863385 - 2¹ = 28863383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28863383) 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, 70194 + ... + 70603.

It is an arithmetic number, because the mean of its divisors is an integer number (4435137).

Almost surely, 2^28863385 is an apocalyptic number.

It is an amenable number.

28863385 is a deficient number, since it is larger than the sum of its proper divisors (6617711).

28863385 is a wasteful number, since it uses less digits than its factorization.

28863385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140843.

The product of its digits is 276480, while the sum is 43.

The square root of 28863385 is about 5372.4654489350. The cubic root of 28863385 is about 306.7484809804.

The spelling of 28863385 in words is "twenty-eight million, eight hundred sixty-three thousand, three hundred eighty-five".