28285230 has 24 divisors (see below), whose sum is σ = 67954536. Its totient is φ = 7534960.

The previous prime is 28285223. The next prime is 28285241. The reversal of 28285230 is 3258282.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 28645 + ... + 29615.

It is an arithmetic number, because the mean of its divisors is an integer number (2831439).

Almost surely, 2^28285230 is an apocalyptic number.

28285230 is an abundant number, since it is smaller than the sum of its proper divisors (39669306).

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

28285230 is an frugal number, since it uses more digits than its factorization.

28285230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1952 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 28285230 is about 5318.3860333752. The cubic root of 28285230 is about 304.6865183663.

Multiplying 28285230 by its sum of digits (30), we get a square (848556900 = 29130²).

28285230 divided by its sum of digits (30) gives a square (942841 = 971²).

Multiplying 28285230 by its product of nonzero digits (7680), we get a square (217230566400 = 466080²).

The spelling of 28285230 in words is "twenty-eight million, two hundred eighty-five thousand, two hundred thirty".