28002387 has 16 divisors (see below), whose sum is σ = 42762752. Its totient is φ = 15966720.

The previous prime is 28002379. The next prime is 28002407. The reversal of 28002387 is 78320082.

It is not a de Polignac number, because 28002387 - 2³ = 28002379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28002307) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10962 + ... + 13272.

It is an arithmetic number, because the mean of its divisors is an integer number (2672672).

Almost surely, 2^28002387 is an apocalyptic number.

28002387 is a deficient number, since it is larger than the sum of its proper divisors (14760365).

28002387 is a wasteful number, since it uses less digits than its factorization.

28002387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2898.

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 28002387 is about 5291.7281676216. The cubic root of 28002387 is about 303.6675259160.

The spelling of 28002387 in words is "twenty-eight million, two thousand, three hundred eighty-seven".