28033012 has 24 divisors (see below), whose sum is σ = 57435840. Its totient is φ = 11720640.

The previous prime is 28033007. The next prime is 28033043. The reversal of 28033012 is 21033082.

It is a happy number.

It is a congruent 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, 11062 + ... + 13357.

It is an arithmetic number, because the mean of its divisors is an integer number (2393160).

Almost surely, 2^28033012 is an apocalyptic number.

It is an amenable number.

28033012 is an abundant number, since it is smaller than the sum of its proper divisors (29402828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28033012 is a wasteful number, since it uses less digits than its factorization.

28033012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24471 (or 24469 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 28033012 is about 5294.6210440408. The cubic root of 28033012 is about 303.7781882650.

Adding to 28033012 its reverse (21033082), we get a palindrome (49066094).

The spelling of 28033012 in words is "twenty-eight million, thirty-three thousand, twelve".