28319360 has 32 divisors (see below), whose sum is σ = 67702500. Its totient is φ = 11327488.

The previous prime is 28319353. The next prime is 28319363. The reversal of 28319360 is 6391382.

It can be written as a sum of positive squares in 2 ways, for example, as 23892544 + 4426816 = 4888^2 + 2104^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (28319363) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21485 + ... + 22764.

Almost surely, 2^28319360 is an apocalyptic number.

28319360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28319360 is an abundant number, since it is smaller than the sum of its proper divisors (39383140).

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

28319360 is an equidigital number, since it uses as much as digits as its factorization.

28319360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44268 (or 44256 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 28319360 is about 5321.5937462381. The cubic root of 28319360 is about 304.8090177661.

The spelling of 28319360 in words is "twenty-eight million, three hundred nineteen thousand, three hundred sixty".