28397568 has 52 divisors (see below), whose sum is σ = 75750368. Its totient is φ = 9461760.

The previous prime is 28397557. The next prime is 28397573. The reversal of 28397568 is 86579382.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11133 + ... + 13443.

Almost surely, 2^28397568 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 28397568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37875184).

28397568 is an abundant number, since it is smaller than the sum of its proper divisors (47352800).

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

28397568 is an equidigital number, since it uses as much as digits as its factorization.

28397568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2338 (or 2316 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 28397568 is about 5328.9368545705. The cubic root of 28397568 is about 305.0893512291.

The spelling of 28397568 in words is "twenty-eight million, three hundred ninety-seven thousand, five hundred sixty-eight".