2180386860 has 96 divisors (see below), whose sum is σ = 6330777600. Its totient is φ = 560113920.

The previous prime is 2180386811. The next prime is 2180386861. The reversal of 2180386860 is 686830812.

It is not an unprimeable number, because it can be changed into a prime (2180386861) 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, 423381 + ... + 428499.

It is an arithmetic number, because the mean of its divisors is an integer number (65945600).

Almost surely, 2^2180386860 is an apocalyptic number.

2180386860 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 2180386860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3165388800).

2180386860 is an abundant number, since it is smaller than the sum of its proper divisors (4150390740).

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

2180386860 is a wasteful number, since it uses less digits than its factorization.

2180386860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5391 (or 5389 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 42.

The square root of 2180386860 is about 46694.6127513657. The cubic root of 2180386860 is about 1296.7149523575.

The spelling of 2180386860 in words is "two billion, one hundred eighty million, three hundred eighty-six thousand, eight hundred sixty".