28533768 has 48 divisors (see below), whose sum is σ = 73145520. Its totient is φ = 9275616.

The previous prime is 28533761. The next prime is 28533779. The reversal of 28533768 is 86733582.

It is not an unprimeable number, because it can be changed into a prime (28533761) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44055 + ... + 44697.

It is an arithmetic number, because the mean of its divisors is an integer number (1523865).

Almost surely, 2^28533768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28533768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36572760).

28533768 is an abundant number, since it is smaller than the sum of its proper divisors (44611752).

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

28533768 is a wasteful number, since it uses less digits than its factorization.

28533768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738 (or 691 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 28533768 is about 5341.7008527247. The cubic root of 28533768 is about 305.5763285394.

The spelling of 28533768 in words is "twenty-eight million, five hundred thirty-three thousand, seven hundred sixty-eight".