28262784 has 64 divisors (see below), whose sum is σ = 81910080. Its totient is φ = 8563200.

The previous prime is 28262777. The next prime is 28262809. The reversal of 28262784 is 48726282.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 879 + ... + 7569.

It is an arithmetic number, because the mean of its divisors is an integer number (1279845).

Almost surely, 2^28262784 is an apocalyptic number.

28262784 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 28262784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40955040).

28262784 is an abundant number, since it is smaller than the sum of its proper divisors (53647296).

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

28262784 is a wasteful number, since it uses less digits than its factorization.

28262784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6719 (or 6707 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 28262784 is about 5316.2753879008. The cubic root of 28262784 is about 304.6059014573.

It can be divided in two parts, 2826278 and 4, that added together give a palindrome (2826282).

The spelling of 28262784 in words is "twenty-eight million, two hundred sixty-two thousand, seven hundred eighty-four".