2180172828 has 24 divisors (see below), whose sum is σ = 5089673232. Its totient is φ = 726352384.

The previous prime is 2180172821. The next prime is 2180172833. The reversal of 2180172828 is 8282710812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180172821) 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, 21525 + ... + 69452.

It is an arithmetic number, because the mean of its divisors is an integer number (212069718).

Almost surely, 2^2180172828 is an apocalyptic number.

It is an amenable number.

2180172828 is an abundant number, since it is smaller than the sum of its proper divisors (2909500404).

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

2180172828 is a wasteful number, since it uses less digits than its factorization.

2180172828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92981 (or 92979 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 39.

The square root of 2180172828 is about 46692.3208675688. The cubic root of 2180172828 is about 1296.6725214199.

The spelling of 2180172828 in words is "two billion, one hundred eighty million, one hundred seventy-two thousand, eight hundred twenty-eight".