28093500 has 96 divisors (see below), whose sum is σ = 90941760. Its totient is φ = 7488000.

The previous prime is 28093477. The next prime is 28093517. The reversal of 28093500 is 539082.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent 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 31 ways as a sum of consecutive naturals, for example, 12460 + ... + 14540.

It is an arithmetic number, because the mean of its divisors is an integer number (947310).

Almost surely, 2^28093500 is an apocalyptic number.

28093500 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 28093500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45470880).

28093500 is an abundant number, since it is smaller than the sum of its proper divisors (62848260).

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

28093500 is a wasteful number, since it uses less digits than its factorization.

28093500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2109 (or 2091 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 28093500 is about 5300.3301783945. The cubic root of 28093500 is about 303.9965229288.

The spelling of 28093500 in words is "twenty-eight million, ninety-three thousand, five hundred".