28089212 has 12 divisors (see below), whose sum is σ = 49616280. Its totient is φ = 13913136.

The previous prime is 28089181. The next prime is 28089241. The reversal of 28089212 is 21298082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32387 + ... + 33242.

It is an arithmetic number, because the mean of its divisors is an integer number (4134690).

Almost surely, 2^28089212 is an apocalyptic number.

It is an amenable number.

28089212 is a deficient number, since it is larger than the sum of its proper divisors (21527068).

28089212 is a wasteful number, since it uses less digits than its factorization.

28089212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65740 (or 65738 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 28089212 is about 5299.9256598560. The cubic root of 28089212 is about 303.9810554907.

The spelling of 28089212 in words is "twenty-eight million, eighty-nine thousand, two hundred twelve".