28032860 has 48 divisors (see below), whose sum is σ = 61992000. Its totient is φ = 10627584.

The previous prime is 28032857. The next prime is 28032863. The reversal of 28032860 is 6823082.

It is an interprime number because it is at equal distance from previous prime (28032857) and next prime (28032863).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28032863) 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 15 ways as a sum of consecutive naturals, for example, 68336 + ... + 68744.

It is an arithmetic number, because the mean of its divisors is an integer number (1291500).

Almost surely, 2^28032860 is an apocalyptic number.

28032860 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 28032860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30996000).

28032860 is an abundant number, since it is smaller than the sum of its proper divisors (33959140).

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

28032860 is a wasteful number, since it uses less digits than its factorization.

28032860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28032860 is about 5294.6066898307. The cubic root of 28032860 is about 303.7776392175. Note that the first 3 decimals are identical.

The spelling of 28032860 in words is "twenty-eight million, thirty-two thousand, eight hundred sixty".