2160685380 has 216 divisors, whose sum is σ = 7478932608. Its totient is φ = 464636928.

The previous prime is 2160685369. The next prime is 2160685381. The reversal of 2160685380 is 835860612.

It is a happy number.

It is a super-2 number, since 2×2160685380² = 9337122622691488800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2160685381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 848389 + ... + 850931.

It is an arithmetic number, because the mean of its divisors is an integer number (34624688).

Almost surely, 2^2160685380 is an apocalyptic number.

2160685380 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 2160685380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3739466304).

2160685380 is an abundant number, since it is smaller than the sum of its proper divisors (5318247228).

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

2160685380 is a wasteful number, since it uses less digits than its factorization.

2160685380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2603 (or 2577 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 2160685380 is about 46483.1730844614. The cubic root of 2160685380 is about 1292.7975223800.

The spelling of 2160685380 in words is "two billion, one hundred sixty million, six hundred eighty-five thousand, three hundred eighty".