28550367180 has 144 divisors (see below), whose sum is σ = 89790180480. Its totient is φ = 7334401536.

The previous prime is 28550367163. The next prime is 28550367229. The reversal of 28550367180 is 8176305582.

28550367180 is a `hidden beast` number, since 2 + 8 + 5 + 503 + 67 + 1 + 80 = 666.

It is a super-2 number, since 2×28550367180² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 2410954 + ... + 2422766.

It is an arithmetic number, because the mean of its divisors is an integer number (623542920).

Almost surely, 2^28550367180 is an apocalyptic number.

28550367180 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 28550367180, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44895090240).

28550367180 is an abundant number, since it is smaller than the sum of its proper divisors (61239813300).

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

28550367180 is a wasteful number, since it uses less digits than its factorization.

28550367180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12320 (or 12315 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 28550367180 in words is "twenty-eight billion, five hundred fifty million, three hundred sixty-seven thousand, one hundred eighty".