28334784 has 56 divisors (see below), whose sum is σ = 79388208. Its totient is φ = 8888320.

The previous prime is 28334783. The next prime is 28334791. The reversal of 28334784 is 48743382.

It is not an unprimeable number, because it can be changed into a prime (28334783) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1077 + ... + 7604.

Almost surely, 2^28334784 is an apocalyptic number.

28334784 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 28334784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39694104).

28334784 is an abundant number, since it is smaller than the sum of its proper divisors (51053424).

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

28334784 is a wasteful number, since it uses less digits than its factorization.

28334784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8713 (or 8703 counting only the distinct ones).

The product of its digits is 129024, while the sum is 39.

The square root of 28334784 is about 5323.0427388853. The cubic root of 28334784 is about 304.8643452996.

The spelling of 28334784 in words is "twenty-eight million, three hundred thirty-four thousand, seven hundred eighty-four".