28876287 has 12 divisors (see below), whose sum is σ = 42320600. Its totient is φ = 17500560.

The previous prime is 28876273. The next prime is 28876301. The reversal of 28876287 is 78267882.

It is an interprime number because it is at equal distance from previous prime (28876273) and next prime (28876301).

It is not a de Polignac number, because 28876287 - 2⁴ = 28876271 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 (28876207) 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, 39412 + ... + 40137.

Almost surely, 2^28876287 is an apocalyptic number.

28876287 is a deficient number, since it is larger than the sum of its proper divisors (13444313).

28876287 is a wasteful number, since it uses less digits than its factorization.

28876287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79574 (or 79563 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28876287 is about 5373.6660670347. Note that the first 3 decimals coincide. The cubic root of 28876287 is about 306.7941799326.

The spelling of 28876287 in words is "twenty-eight million, eight hundred seventy-six thousand, two hundred eighty-seven".