28809060 has 144 divisors (see below), whose sum is σ = 96526080. Its totient is φ = 6397440.

The previous prime is 28809059. The next prime is 28809071. The reversal of 28809060 is 6090882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120421 + ... + 120659.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^28809060 is an apocalyptic number.

28809060 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 28809060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48263040).

28809060 is an abundant number, since it is smaller than the sum of its proper divisors (67717020).

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

28809060 is a wasteful number, since it uses less digits than its factorization.

28809060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 28809060 is about 5367.4071952853. The cubic root of 28809060 is about 306.5559120109. Note that the first 3 decimals are identical.

The spelling of 28809060 in words is "twenty-eight million, eight hundred nine thousand, sixty".