28317760 has 28 divisors (see below), whose sum is σ = 67432428. Its totient is φ = 11326976.

The previous prime is 28317749. The next prime is 28317769. The reversal of 28317760 is 6771382.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 22127616 = 2488^2 + 4704^2 .

It is not an unprimeable number, because it can be changed into a prime (28317769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43927 + ... + 44566.

It is an arithmetic number, because the mean of its divisors is an integer number (2408301).

Almost surely, 2^28317760 is an apocalyptic number.

28317760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28317760 is an abundant number, since it is smaller than the sum of its proper divisors (39114668).

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

28317760 is an equidigital number, since it uses as much as digits as its factorization.

28317760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88510 (or 88500 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 28317760 is about 5321.4434132104. The cubic root of 28317760 is about 304.8032772454.

The spelling of 28317760 in words is "twenty-eight million, three hundred seventeen thousand, seven hundred sixty".