28868087 has 6 divisors (see below), whose sum is σ = 30467808. Its totient is φ = 27348372.

The previous prime is 28868083. The next prime is 28868107. The reversal of 28868087 is 78086882.

It is not a de Polignac number, because 28868087 - 2² = 28868083 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 (28868083) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39623 + ... + 40344.

It is an arithmetic number, because the mean of its divisors is an integer number (5077968).

Almost surely, 2^28868087 is an apocalyptic number.

28868087 is a deficient number, since it is larger than the sum of its proper divisors (1599721).

28868087 is an equidigital number, since it uses as much as digits as its factorization.

28868087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80005 (or 79986 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 47.

The square root of 28868087 is about 5372.9030328120. The cubic root of 28868087 is about 306.7651370662.

The spelling of 28868087 in words is "twenty-eight million, eight hundred sixty-eight thousand, eighty-seven".