28203230 has 16 divisors (see below), whose sum is σ = 55381104. Its totient is φ = 10255680.

The previous prime is 28203209. The next prime is 28203233. The reversal of 28203230 is 3230282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28203233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128087 + ... + 128306.

It is an arithmetic number, because the mean of its divisors is an integer number (3461319).

Almost surely, 2^28203230 is an apocalyptic number.

28203230 is a deficient number, since it is larger than the sum of its proper divisors (27177874).

28203230 is a wasteful number, since it uses less digits than its factorization.

28203230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256411.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 28203230 is about 5310.6713323270. The cubic root of 28203230 is about 304.3918006291.

The spelling of 28203230 in words is "twenty-eight million, two hundred three thousand, two hundred thirty".