28284325 has 24 divisors (see below), whose sum is σ = 36435168. Its totient is φ = 21766080.

The previous prime is 28284313. The next prime is 28284349. The reversal of 28284325 is 52348282.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-28284325 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 89067 + ... + 89383.

It is an arithmetic number, because the mean of its divisors is an integer number (1518132).

Almost surely, 2^28284325 is an apocalyptic number.

28284325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28284325 is a deficient number, since it is larger than the sum of its proper divisors (8150843).

28284325 is a wasteful number, since it uses less digits than its factorization.

28284325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 448 counting only the distinct ones).

The product of its digits is 30720, while the sum is 34.

The square root of 28284325 is about 5318.3009504916. The cubic root of 28284325 is about 304.6832687994.

The spelling of 28284325 in words is "twenty-eight million, two hundred eighty-four thousand, three hundred twenty-five".