28369824 has 144 divisors (see below), whose sum is σ = 89516448. Its totient is φ = 7838208.

The previous prime is 28369813. The next prime is 28369829. The reversal of 28369824 is 42896382.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28369829) 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 23 ways as a sum of consecutive naturals, for example, 173967 + ... + 174129.

It is an arithmetic number, because the mean of its divisors is an integer number (621642).

Almost surely, 2^28369824 is an apocalyptic number.

28369824 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 28369824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44758224).

28369824 is an abundant number, since it is smaller than the sum of its proper divisors (61146624).

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

28369824 is a wasteful number, since it uses less digits than its factorization.

28369824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227 (or 212 counting only the distinct ones).

The product of its digits is 165888, while the sum is 42.

The square root of 28369824 is about 5326.3330725744. Note that the first 3 decimals coincide. The cubic root of 28369824 is about 304.9899629412.

It can be divided in two parts, 283 and 69824, that added together give a palindrome (70107).

The spelling of 28369824 in words is "twenty-eight million, three hundred sixty-nine thousand, eight hundred twenty-four".