28288844 has 12 divisors (see below), whose sum is σ = 49543704. Its totient is φ = 14133504.

The previous prime is 28288829. The next prime is 28288859. The reversal of 28288844 is 44888282.

It is an interprime number because it is at equal distance from previous prime (28288829) and next prime (28288859).

It is a junction number, because it is equal to n+sod(n) for n = 28288795 and 28288804.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6779 + ... + 10125.

It is an arithmetic number, because the mean of its divisors is an integer number (4128642).

Almost surely, 2^28288844 is an apocalyptic number.

It is an amenable number.

28288844 is a deficient number, since it is larger than the sum of its proper divisors (21254860).

28288844 is a wasteful number, since it uses less digits than its factorization.

28288844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5464 (or 5462 counting only the distinct ones).

The product of its digits is 262144, while the sum is 44.

The square root of 28288844 is about 5318.7257872539. The cubic root of 28288844 is about 304.6994943987.

The spelling of 28288844 in words is "twenty-eight million, two hundred eighty-eight thousand, eight hundred forty-four".