28855287 has 6 divisors (see below), whose sum is σ = 41679872. Its totient is φ = 19236852.

The previous prime is 28855283. The next prime is 28855291. The reversal of 28855287 is 78255882.

It is an interprime number because it is at equal distance from previous prime (28855283) and next prime (28855291).

It is not a de Polignac number, because 28855287 - 2² = 28855283 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 (28855283) 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, 1603063 + ... + 1603080.

Almost surely, 2^28855287 is an apocalyptic number.

28855287 is a deficient number, since it is larger than the sum of its proper divisors (12824585).

28855287 is a wasteful number, since it uses less digits than its factorization.

28855287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3206149 (or 3206146 counting only the distinct ones).

The product of its digits is 358400, while the sum is 45.

The square root of 28855287 is about 5371.7117383568. The cubic root of 28855287 is about 306.7197908650.

The spelling of 28855287 in words is "twenty-eight million, eight hundred fifty-five thousand, two hundred eighty-seven".