28851984 has 240 divisors, whose sum is σ = 101779200. Its totient is φ = 7789824.

The previous prime is 28851983. The next prime is 28851997. The reversal of 28851984 is 48915882.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28851983) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 613849 + ... + 613895.

It is an arithmetic number, because the mean of its divisors is an integer number (424080).

Almost surely, 2^28851984 is an apocalyptic number.

28851984 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 28851984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50889600).

28851984 is an abundant number, since it is smaller than the sum of its proper divisors (72927216).

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

28851984 is a wasteful number, since it uses less digits than its factorization.

28851984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107 (or 88 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 28851984 is about 5371.4042856594. The cubic root of 28851984 is about 306.7080872428.

The spelling of 28851984 in words is "twenty-eight million, eight hundred fifty-one thousand, nine hundred eighty-four".