28180366220 has 48 divisors (see below), whose sum is σ = 60514231680. Its totient is φ = 11018379264.

The previous prime is 28180366187. The next prime is 28180366223. The reversal of 28180366220 is 2266308182.

It is not an unprimeable number, because it can be changed into a prime (28180366223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741932 + ... + 778988.

It is an arithmetic number, because the mean of its divisors is an integer number (1260713160).

Almost surely, 2^28180366220 is an apocalyptic number.

28180366220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28180366220 is an abundant number, since it is smaller than the sum of its proper divisors (32333865460).

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

28180366220 is a wasteful number, since it uses less digits than its factorization.

28180366220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37922 (or 37920 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 28180366220 in words is "twenty-eight billion, one hundred eighty million, three hundred sixty-six thousand, two hundred twenty".