28768587 has 4 divisors (see below), whose sum is σ = 38358120. Its totient is φ = 19179056.

The previous prime is 28768567. The next prime is 28768631. The reversal of 28768587 is 78586782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28768587 - 2¹¹ = 28766539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28768507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4794762 + ... + 4794767.

It is an arithmetic number, because the mean of its divisors is an integer number (9589530).

Almost surely, 2^28768587 is an apocalyptic number.

28768587 is a deficient number, since it is larger than the sum of its proper divisors (9589533).

28768587 is an equidigital number, since it uses as much as digits as its factorization.

28768587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9589532.

The product of its digits is 1505280, while the sum is 51.

The square root of 28768587 is about 5363.6356140215. The cubic root of 28768587 is about 306.4122876077.

The spelling of 28768587 in words is "twenty-eight million, seven hundred sixty-eight thousand, five hundred eighty-seven".