28180260 has 72 divisors (see below), whose sum is σ = 87325056. Its totient is φ = 7352640.

The previous prime is 28180253. The next prime is 28180261. The reversal of 28180260 is 6208182.

It is not an unprimeable number, because it can be changed into a prime (28180261) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6795 + ... + 10125.

It is an arithmetic number, because the mean of its divisors is an integer number (1212848).

Almost surely, 2^28180260 is an apocalyptic number.

28180260 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 28180260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43662528).

28180260 is an abundant number, since it is smaller than the sum of its proper divisors (59144796).

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

28180260 is a wasteful number, since it uses less digits than its factorization.

28180260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393 (or 3388 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28180260 is about 5308.5082650402. The cubic root of 28180260 is about 304.3091413179.

The spelling of 28180260 in words is "twenty-eight million, one hundred eighty thousand, two hundred sixty".