28285518 has 16 divisors (see below), whose sum is σ = 59898960. Its totient is φ = 8873856.

The previous prime is 28285513. The next prime is 28285541. The reversal of 28285518 is 81558282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28285511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138553 + ... + 138756.

It is an arithmetic number, because the mean of its divisors is an integer number (3743685).

Almost surely, 2^28285518 is an apocalyptic number.

28285518 is an abundant number, since it is smaller than the sum of its proper divisors (31613442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28285518 is a wasteful number, since it uses less digits than its factorization.

28285518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277331.

The product of its digits is 51200, while the sum is 39.

The square root of 28285518 is about 5318.4131091896. The cubic root of 28285518 is about 304.6875524681.

The spelling of 28285518 in words is "twenty-eight million, two hundred eighty-five thousand, five hundred eighteen".