28008387 has 12 divisors (see below), whose sum is σ = 44134584. Its totient is φ = 16974720.

The previous prime is 28008373. The next prime is 28008391. The reversal of 28008387 is 78380082.

It is not a de Polignac number, because 28008387 - 2¹⁰ = 28007363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28008307) 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, 141358 + ... + 141555.

It is an arithmetic number, because the mean of its divisors is an integer number (3677882).

Almost surely, 2^28008387 is an apocalyptic number.

28008387 is a deficient number, since it is larger than the sum of its proper divisors (16126197).

28008387 is a wasteful number, since it uses less digits than its factorization.

28008387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282930 (or 282927 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28008387 is about 5292.2950598016. The cubic root of 28008387 is about 303.6892130558.

The spelling of 28008387 in words is "twenty-eight million, eight thousand, three hundred eighty-seven".