28887984 has 60 divisors (see below), whose sum is σ = 81854136. Its totient is φ = 9509376.

The previous prime is 28887979. The next prime is 28888003. The reversal of 28887984 is 48978882.

It is a self number, because there is not a number n which added to its sum of digits gives 28887984.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10744 + ... + 13160.

Almost surely, 2^28887984 is an apocalyptic number.

28887984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28887984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40927068).

28887984 is an abundant number, since it is smaller than the sum of its proper divisors (52966152).

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

28887984 is a wasteful number, since it uses less digits than its factorization.

28887984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2514 (or 2505 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The square root of 28887984 is about 5374.7543199666. The cubic root of 28887984 is about 306.8355990053.

The spelling of 28887984 in words is "twenty-eight million, eight hundred eighty-seven thousand, nine hundred eighty-four".