28513984 has 56 divisors (see below), whose sum is σ = 60350400. Its totient is φ = 13328640.

The previous prime is 28513973. The next prime is 28513993. The reversal of 28513984 is 48931582.

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, 159207 + ... + 159385.

Almost surely, 2^28513984 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 28513984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30175200).

28513984 is an abundant number, since it is smaller than the sum of its proper divisors (31836416).

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

28513984 is a wasteful number, since it uses less digits than its factorization.

28513984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341 (or 331 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 28513984 is about 5339.8486869948. The cubic root of 28513984 is about 305.5056880284.

The spelling of 28513984 in words is "twenty-eight million, five hundred thirteen thousand, nine hundred eighty-four".