28820264 has 48 divisors (see below), whose sum is σ = 62563200. Its totient is φ = 12402720.

The previous prime is 28820263. The next prime is 28820269. The reversal of 28820264 is 46202882.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28820264.

It is not an unprimeable number, because it can be changed into a prime (28820263) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 17609 + ... + 19175.

It is an arithmetic number, because the mean of its divisors is an integer number (1303400).

Almost surely, 2^28820264 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 28820264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31281600).

28820264 is an abundant number, since it is smaller than the sum of its proper divisors (33742936).

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

28820264 is a wasteful number, since it uses less digits than its factorization.

28820264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614 (or 1599 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 28820264 is about 5368.4508007432. The cubic root of 28820264 is about 306.5956472804.

The spelling of 28820264 in words is "twenty-eight million, eight hundred twenty thousand, two hundred sixty-four".