28331230 has 8 divisors (see below), whose sum is σ = 50996232. Its totient is φ = 11332488.

The previous prime is 28331209. The next prime is 28331249. The reversal of 28331230 is 3213382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1416552 + ... + 1416571.

It is an arithmetic number, because the mean of its divisors is an integer number (6374529).

Almost surely, 2^28331230 is an apocalyptic number.

28331230 is a deficient number, since it is larger than the sum of its proper divisors (22665002).

28331230 is a wasteful number, since it uses less digits than its factorization.

28331230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2833130.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 28331230 is about 5322.7088967931. The cubic root of 28331230 is about 304.8515985030.

It can be divided in two parts, 28331 and 230, that added together give a 4-th power (28561 = 13⁴).

The spelling of 28331230 in words is "twenty-eight million, three hundred thirty-one thousand, two hundred thirty".