28484784 has 100 divisors (see below), whose sum is σ = 85222720. Its totient is φ = 9175680.

The previous prime is 28484767. The next prime is 28484803. The reversal of 28484784 is 48748482.

It is a happy number.

It is a super-2 number, since 2×28484784² = 1622765839053312, which contains 22 as substring.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 39822 + ... + 40530.

Almost surely, 2^28484784 is an apocalyptic number.

28484784 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 28484784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42611360).

28484784 is an abundant number, since it is smaller than the sum of its proper divisors (56737936).

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

28484784 is a wasteful number, since it uses less digits than its factorization.

28484784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 745 counting only the distinct ones).

The product of its digits is 458752, while the sum is 45.

The square root of 28484784 is about 5337.1138267794. The cubic root of 28484784 is about 305.4013671339.

It can be divided in two parts, 2848478 and 4, that added together give a palindrome (2848482).

The spelling of 28484784 in words is "twenty-eight million, four hundred eighty-four thousand, seven hundred eighty-four".