28268032 has 80 divisors (see below), whose sum is σ = 63245952. Its totient is φ = 12533760.

The previous prime is 28268003. The next prime is 28268033. The reversal of 28268032 is 23086282.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 28267985 and 28268003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206268 + ... + 206404.

Almost surely, 2^28268032 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 28268032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31622976).

28268032 is an abundant number, since it is smaller than the sum of its proper divisors (34977920).

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

28268032 is a wasteful number, since it uses less digits than its factorization.

28268032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 28268032 is about 5316.7689436348. The cubic root of 28268032 is about 304.6247539624.

The spelling of 28268032 in words is "twenty-eight million, two hundred sixty-eight thousand, thirty-two".