28801500 has 192 divisors, whose sum is σ = 103713792. Its totient is φ = 6048000.

The previous prime is 28801489. The next prime is 28801523. The reversal of 28801500 is 510882.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 136395 + ... + 136605.

It is an arithmetic number, because the mean of its divisors is an integer number (540176).

Almost surely, 2^28801500 is an apocalyptic number.

28801500 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 28801500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51856896).

28801500 is an abundant number, since it is smaller than the sum of its proper divisors (74912292).

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

28801500 is a wasteful number, since it uses less digits than its factorization.

28801500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 24.

The square root of 28801500 is about 5366.7028984284. The cubic root of 28801500 is about 306.5290944583.

The spelling of 28801500 in words is "twenty-eight million, eight hundred one thousand, five hundred".