28038587 has 6 divisors (see below), whose sum is σ = 29311212. Its totient is φ = 26819012.

The previous prime is 28038583. The next prime is 28038599. The reversal of 28038587 is 78583082.

It is not a de Polignac number, because 28038587 - 2² = 28038583 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28038583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25973 + ... + 27030.

It is an arithmetic number, because the mean of its divisors is an integer number (4885202).

Almost surely, 2^28038587 is an apocalyptic number.

28038587 is a deficient number, since it is larger than the sum of its proper divisors (1272625).

28038587 is an equidigital number, since it uses as much as digits as its factorization.

28038587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53049 (or 53026 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The square root of 28038587 is about 5295.1474955850. The cubic root of 28038587 is about 303.7983246569.

The spelling of 28038587 in words is "twenty-eight million, thirty-eight thousand, five hundred eighty-seven".