28186368 has 144 divisors (see below), whose sum is σ = 88300800. Its totient is φ = 7977984.

The previous prime is 28186349. The next prime is 28186387. The reversal of 28186368 is 86368182.

It is an interprime number because it is at equal distance from previous prime (28186349) and next prime (28186387).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 263371 + ... + 263477.

It is an arithmetic number, because the mean of its divisors is an integer number (613200).

Almost surely, 2^28186368 is an apocalyptic number.

28186368 is a gapful number since it is divisible by the number (28) 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 28186368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44150400).

28186368 is an abundant number, since it is smaller than the sum of its proper divisors (60114432).

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

28186368 is an equidigital number, since it uses as much as digits as its factorization.

28186368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147 (or 119 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 28186368 is about 5309.0835367321. The cubic root of 28186368 is about 304.3311258083.

The spelling of 28186368 in words is "twenty-eight million, one hundred eighty-six thousand, three hundred sixty-eight".