28684832 has 48 divisors (see below), whose sum is σ = 64864800. Its totient is φ = 12349440.

The previous prime is 28684829. The next prime is 28684837. The reversal of 28684832 is 23848682.

It is a self number, because there is not a number n which added to its sum of digits gives 28684832.

It is not an unprimeable number, because it can be changed into a prime (28684837) 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 7 ways as a sum of consecutive naturals, for example, 4544 + ... + 8832.

It is an arithmetic number, because the mean of its divisors is an integer number (1351350).

Almost surely, 2^28684832 is an apocalyptic number.

28684832 is a gapful number since it is divisible by the number (22) 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 28684832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32432400).

28684832 is an abundant number, since it is smaller than the sum of its proper divisors (36179968).

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

28684832 is a wasteful number, since it uses less digits than its factorization.

28684832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4329 (or 4321 counting only the distinct ones).

The product of its digits is 147456, while the sum is 41.

The square root of 28684832 is about 5355.8222524651. The cubic root of 28684832 is about 306.1146422792.

The spelling of 28684832 in words is "twenty-eight million, six hundred eighty-four thousand, eight hundred thirty-two".