28452285 has 12 divisors (see below), whose sum is σ = 49317372. Its totient is φ = 15174528.

The previous prime is 28452269. The next prime is 28452293. The reversal of 28452285 is 58225482.

It can be written as a sum of positive squares in 2 ways, for example, as 10381284 + 18071001 = 3222^2 + 4251^2 .

It is not a de Polignac number, because 28452285 - 2⁴ = 28452269 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 316092 + ... + 316181.

It is an arithmetic number, because the mean of its divisors is an integer number (4109781).

Almost surely, 2^28452285 is an apocalyptic number.

It is an amenable number.

28452285 is a deficient number, since it is larger than the sum of its proper divisors (20865087).

28452285 is a wasteful number, since it uses less digits than its factorization.

28452285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 632284 (or 632281 counting only the distinct ones).

The product of its digits is 51200, while the sum is 36.

The square root of 28452285 is about 5334.0683347704. The cubic root of 28452285 is about 305.2851762572.

The spelling of 28452285 in words is "twenty-eight million, four hundred fifty-two thousand, two hundred eighty-five".