28243296 has 96 divisors (see below), whose sum is σ = 83472480. Its totient is φ = 9289728.

The previous prime is 28243283. The next prime is 28243309. The reversal of 28243296 is 69234282.

It is an interprime number because it is at equal distance from previous prime (28243283) and next prime (28243309).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 28243296.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83640 + ... + 83976.

It is an arithmetic number, because the mean of its divisors is an integer number (869505).

Almost surely, 2^28243296 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 28243296, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41736240).

28243296 is an abundant number, since it is smaller than the sum of its proper divisors (55229184).

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

28243296 is a wasteful number, since it uses less digits than its factorization.

28243296 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453 (or 439 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 28243296 is about 5314.4422096773. The cubic root of 28243296 is about 304.5358738583.

The spelling of 28243296 in words is "twenty-eight million, two hundred forty-three thousand, two hundred ninety-six".