28984872 has 80 divisors (see below), whose sum is σ = 84702240. Its totient is φ = 8264928.

The previous prime is 28984849. The next prime is 28984873. The reversal of 28984872 is 27848982.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984873) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 57373 + ... + 57875.

It is an arithmetic number, because the mean of its divisors is an integer number (1058778).

Almost surely, 2^28984872 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 28984872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42351120).

28984872 is an abundant number, since it is smaller than the sum of its proper divisors (55717368).

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

28984872 is an equidigital number, since it uses as much as digits as its factorization.

28984872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540 (or 515 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 28984872 is about 5383.7600243696. The cubic root of 28984872 is about 307.1782502776.

The spelling of 28984872 in words is "twenty-eight million, nine hundred eighty-four thousand, eight hundred seventy-two".