2180535240 has 128 divisors (see below), whose sum is σ = 7351223040. Its totient is φ = 513401856.

The previous prime is 2180535193. The next prime is 2180535241. The reversal of 2180535240 is 425350812.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 2180535198 and 2180535207.

It is not an unprimeable number, because it can be changed into a prime (2180535241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5494 + ... + 66266.

It is an arithmetic number, because the mean of its divisors is an integer number (57431430).

Almost surely, 2^2180535240 is an apocalyptic number.

2180535240 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 2180535240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3675611520).

2180535240 is an abundant number, since it is smaller than the sum of its proper divisors (5170687800).

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

2180535240 is a wasteful number, since it uses less digits than its factorization.

2180535240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60823 (or 60819 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 2180535240 is about 46696.2015585850. The cubic root of 2180535240 is about 1296.7443664344.

The spelling of 2180535240 in words is "two billion, one hundred eighty million, five hundred thirty-five thousand, two hundred forty".