28033612 has 24 divisors (see below), whose sum is σ = 52266816. Its totient is φ = 13110528.

The previous prime is 28033609. The next prime is 28033631. The reversal of 28033612 is 21633082.

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, 10573 + ... + 12955.

It is an arithmetic number, because the mean of its divisors is an integer number (2177784).

Almost surely, 2^28033612 is an apocalyptic number.

It is an amenable number.

28033612 is a deficient number, since it is larger than the sum of its proper divisors (24233204).

28033612 is a wasteful number, since it uses less digits than its factorization.

28033612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2575 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 28033612 is about 5294.6777050166. The cubic root of 28033612 is about 303.7803555385.

Adding to 28033612 its reverse (21633082), we get a palindrome (49666694).

The spelling of 28033612 in words is "twenty-eight million, thirty-three thousand, six hundred twelve".