28133210 has 16 divisors (see below), whose sum is σ = 57874176. Its totient is φ = 9645648.

The previous prime is 28133197. The next prime is 28133221. The reversal of 28133210 is 1233182.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200882 + ... + 201021.

It is an arithmetic number, because the mean of its divisors is an integer number (3617136).

Almost surely, 2^28133210 is an apocalyptic number.

28133210 is an abundant number, since it is smaller than the sum of its proper divisors (29740966).

28133210 is a wasteful number, since it uses less digits than its factorization.

28133210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401917.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 28133210 is about 5304.0748486423. The cubic root of 28133210 is about 304.1396879389.

Adding to 28133210 its reverse (1233182), we get a palindrome (29366392).

The spelling of 28133210 in words is "twenty-eight million, one hundred thirty-three thousand, two hundred ten".