28960287 has 4 divisors (see below), whose sum is σ = 38613720. Its totient is φ = 19306856.

The previous prime is 28960249. The next prime is 28960297. The reversal of 28960287 is 78206982.

It is a happy number.

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 28960287 - 2⁸ = 28960031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28960297) 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, 4826712 + ... + 4826717.

It is an arithmetic number, because the mean of its divisors is an integer number (9653430).

Almost surely, 2^28960287 is an apocalyptic number.

28960287 is a deficient number, since it is larger than the sum of its proper divisors (9653433).

28960287 is an equidigital number, since it uses as much as digits as its factorization.

28960287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9653432.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 28960287 is about 5381.4762844409. The cubic root of 28960287 is about 307.0913760686.

The spelling of 28960287 in words is "twenty-eight million, nine hundred sixty thousand, two hundred eighty-seven".