28318080 has 256 divisors, whose sum is σ = 107712000. Its totient is φ = 6322176.

The previous prime is 28318067. The next prime is 28318093. The reversal of 28318080 is 8081382.

It is an interprime number because it is at equal distance from previous prime (28318067) and next prime (28318093).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 658539 + ... + 658581.

It is an arithmetic number, because the mean of its divisors is an integer number (420750).

Almost surely, 2^28318080 is an apocalyptic number.

28318080 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 28318080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53856000).

28318080 is an abundant number, since it is smaller than the sum of its proper divisors (79393920).

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

28318080 is an equidigital number, since it uses as much as digits as its factorization.

28318080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28318080 is about 5321.4734801557. The cubic root of 28318080 is about 304.8044253668.

The spelling of 28318080 in words is "twenty-eight million, three hundred eighteen thousand, eighty".