28310884 has 24 divisors (see below), whose sum is σ = 59084928. Its totient is φ = 11605440.

The previous prime is 28310881. The next prime is 28310903. The reversal of 28310884 is 48801382.

It is a super-2 number, since 2×28310884² = 1603012305722912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28310881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21337 + ... + 22624.

It is an arithmetic number, because the mean of its divisors is an integer number (2461872).

Almost surely, 2^28310884 is an apocalyptic number.

It is an amenable number.

28310884 is an abundant number, since it is smaller than the sum of its proper divisors (30774044).

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

28310884 is a wasteful number, since it uses less digits than its factorization.

28310884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43995 (or 43993 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28310884 is about 5320.7973086747. The cubic root of 28310884 is about 304.7786048962.

The spelling of 28310884 in words is "twenty-eight million, three hundred ten thousand, eight hundred eighty-four".