28875385 has 32 divisors (see below), whose sum is σ = 43545600. Its totient is φ = 17856960.

The previous prime is 28875377. The next prime is 28875389. The reversal of 28875385 is 58357882.

It is not a de Polignac number, because 28875385 - 2³ = 28875377 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28875389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68706 + ... + 69124.

It is an arithmetic number, because the mean of its divisors is an integer number (1360800).

Almost surely, 2^28875385 is an apocalyptic number.

It is an amenable number.

28875385 is a deficient number, since it is larger than the sum of its proper divisors (14670215).

28875385 is a wasteful number, since it uses less digits than its factorization.

28875385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621.

The product of its digits is 537600, while the sum is 46.

The square root of 28875385 is about 5373.5821385739. The cubic root of 28875385 is about 306.7909854865.

The spelling of 28875385 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred eighty-five".