28684460 has 48 divisors (see below), whose sum is σ = 69162240. Its totient is φ = 9789120.

The previous prime is 28684417. The next prime is 28684511. The reversal of 28684460 is 6448682.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46031 + ... + 46649.

It is an arithmetic number, because the mean of its divisors is an integer number (1440880).

Almost surely, 2^28684460 is an apocalyptic number.

28684460 is a gapful number since it is divisible by the number (20) 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 28684460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34581120).

28684460 is an abundant number, since it is smaller than the sum of its proper divisors (40477780).

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

28684460 is a wasteful number, since it uses less digits than its factorization.

28684460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 964 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 38.

The square root of 28684460 is about 5355.7875237914. The cubic root of 28684460 is about 306.1133189882.

The spelling of 28684460 in words is "twenty-eight million, six hundred eighty-four thousand, four hundred sixty".