28236230 has 32 divisors (see below), whose sum is σ = 55987200. Its totient is φ = 10167520.

The previous prime is 28236211. The next prime is 28236253. The reversal of 28236230 is 3263282.

It is a happy number.

It is a super-2 number, since 2×28236230² = 1594569369225800, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28236230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10571 + ... + 12969.

It is an arithmetic number, because the mean of its divisors is an integer number (1749600).

Almost surely, 2^28236230 is an apocalyptic number.

28236230 is a deficient number, since it is larger than the sum of its proper divisors (27750970).

28236230 is a wasteful number, since it uses less digits than its factorization.

28236230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2524.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 28236230 is about 5313.7773758410. Note that the first 3 decimals coincide. The cubic root of 28236230 is about 304.5104751471.

The spelling of 28236230 in words is "twenty-eight million, two hundred thirty-six thousand, two hundred thirty".