28975816180 has 24 divisors (see below), whose sum is σ = 61846744680. Its totient is φ = 11400320640.

The previous prime is 28975816147. The next prime is 28975816187. The reversal of 28975816180 is 8161857982.

It can be written as a sum of positive squares in 4 ways, for example, as 1648656 + 28974167524 = 1284^2 + 170218^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28975816187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11874115 + ... + 11876554.

It is an arithmetic number, because the mean of its divisors is an integer number (2576947695).

Almost surely, 2^28975816180 is an apocalyptic number.

28975816180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28975816180 is an abundant number, since it is smaller than the sum of its proper divisors (32870928500).

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

28975816180 is a wasteful number, since it uses less digits than its factorization.

28975816180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23750739 (or 23750737 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 28975816180 in words is "twenty-eight billion, nine hundred seventy-five million, eight hundred sixteen thousand, one hundred eighty".