28240896 has 88 divisors (see below), whose sum is σ = 78113520. Its totient is φ = 9060352.

The previous prime is 28240837. The next prime is 28240909. The reversal of 28240896 is 69804282.

It is an unprimeable number.

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, 88930 + ... + 89246.

Almost surely, 2^28240896 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 28240896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39056760).

28240896 is an abundant number, since it is smaller than the sum of its proper divisors (49872624).

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

28240896 is a wasteful number, since it uses less digits than its factorization.

28240896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 351 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 28240896 is about 5314.2164050780. The cubic root of 28240896 is about 304.5272475422.

The spelling of 28240896 in words is "twenty-eight million, two hundred forty thousand, eight hundred ninety-six".