28704060 has 288 divisors, whose sum is σ = 115315200. Its totient is φ = 5598720.

The previous prime is 28704017. The next prime is 28704061. The reversal of 28704060 is 6040782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28704061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 263286 + ... + 263394.

It is an arithmetic number, because the mean of its divisors is an integer number (400400).

Almost surely, 2^28704060 is an apocalyptic number.

28704060 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 28704060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57657600).

28704060 is an abundant number, since it is smaller than the sum of its proper divisors (86611140).

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

28704060 is a wasteful number, since it uses less digits than its factorization.

28704060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 28704060 is about 5357.6170075884. The cubic root of 28704060 is about 306.1830251986.

Subtracting from 28704060 its reverse (6040782), we obtain a triangular number (22663278 = T₆₇₃₂).

The spelling of 28704060 in words is "twenty-eight million, seven hundred four thousand, sixty".