28683513 has 12 divisors (see below), whose sum is σ = 41596308. Its totient is φ = 19046400.

The previous prime is 28683511. The next prime is 28683517. The reversal of 28683513 is 31538682.

It can be written as a sum of positive squares in 2 ways, for example, as 21650409 + 7033104 = 4653^2 + 2652^2 .

It is not a de Polignac number, because 28683513 - 2¹ = 28683511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28683511) 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, 3888 + ... + 8513.

It is an arithmetic number, because the mean of its divisors is an integer number (3466359).

Almost surely, 2^28683513 is an apocalyptic number.

It is an amenable number.

28683513 is a deficient number, since it is larger than the sum of its proper divisors (12912795).

28683513 is a wasteful number, since it uses less digits than its factorization.

28683513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12664 (or 12661 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 28683513 is about 5355.6991140280. The cubic root of 28683513 is about 306.1099502361.

The spelling of 28683513 in words is "twenty-eight million, six hundred eighty-three thousand, five hundred thirteen".