28366380 has 144 divisors (see below), whose sum is σ = 100638720. Its totient is φ = 6332544.

The previous prime is 28366363. The next prime is 28366397. The reversal of 28366380 is 8366382.

It is an interprime number because it is at equal distance from previous prime (28366363) and next prime (28366397).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 58981 + ... + 59459.

It is an arithmetic number, because the mean of its divisors is an integer number (698880).

Almost surely, 2^28366380 is an apocalyptic number.

28366380 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 28366380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50319360).

28366380 is an abundant number, since it is smaller than the sum of its proper divisors (72272340).

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

28366380 is a wasteful number, since it uses less digits than its factorization.

28366380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 28366380 is about 5326.0097634158. The cubic root of 28366380 is about 304.9776208609.

It can be divided in two parts, 2836 and 6380, that added together give a square (9216 = 96²).

The spelling of 28366380 in words is "twenty-eight million, three hundred sixty-six thousand, three hundred eighty".