28466784 has 72 divisors (see below), whose sum is σ = 81867240. Its totient is φ = 9381888.

The previous prime is 28466771. The next prime is 28466791. The reversal of 28466784 is 48766482.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27427 + ... + 28445.

It is an arithmetic number, because the mean of its divisors is an integer number (1137045).

Almost surely, 2^28466784 is an apocalyptic number.

28466784 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 28466784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40933620).

28466784 is an abundant number, since it is smaller than the sum of its proper divisors (53400456).

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

28466784 is a wasteful number, since it uses less digits than its factorization.

28466784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132 (or 1121 counting only the distinct ones).

The product of its digits is 516096, while the sum is 45.

The square root of 28466784 is about 5335.4272556188. The cubic root of 28466784 is about 305.3370242091.

The spelling of 28466784 in words is "twenty-eight million, four hundred sixty-six thousand, seven hundred eighty-four".