28292568 has 64 divisors (see below), whose sum is σ = 73470720. Its totient is φ = 9072000.

The previous prime is 28292557. The next prime is 28292569. The reversal of 28292568 is 86529282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28292569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133983 + ... + 134193.

It is an arithmetic number, because the mean of its divisors is an integer number (1147980).

Almost surely, 2^28292568 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 28292568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36735360).

28292568 is an abundant number, since it is smaller than the sum of its proper divisors (45178152).

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

28292568 is a wasteful number, since it uses less digits than its factorization.

28292568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 404 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 28292568 is about 5319.0758595831. The cubic root of 28292568 is about 304.7128642290.

The spelling of 28292568 in words is "twenty-eight million, two hundred ninety-two thousand, five hundred sixty-eight".