28525985 has 8 divisors (see below), whose sum is σ = 35027520. Its totient is φ = 22289904.

The previous prime is 28525967. The next prime is 28525993. The reversal of 28525985 is 58952582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28525985 - 2²⁰ = 27477409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66125 + ... + 66554.

It is an arithmetic number, because the mean of its divisors is an integer number (4378440).

Almost surely, 2^28525985 is an apocalyptic number.

It is an amenable number.

28525985 is a deficient number, since it is larger than the sum of its proper divisors (6501535).

28525985 is a wasteful number, since it uses less digits than its factorization.

28525985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132727.

The product of its digits is 288000, while the sum is 44.

The square root of 28525985 is about 5340.9722897615. The cubic root of 28525985 is about 305.5485425510.

The spelling of 28525985 in words is "twenty-eight million, five hundred twenty-five thousand, nine hundred eighty-five".