2185448680 has 32 divisors (see below), whose sum is σ = 4929935400. Its totient is φ = 871926016.

The previous prime is 2185448659. The next prime is 2185448687. The reversal of 2185448680 is 868445812.

It can be written as a sum of positive squares in 4 ways, for example, as 1734056164 + 451392516 = 41642^2 + 21246^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2185448680.

It is not an unprimeable number, because it can be changed into a prime (2185448687) 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, 54667 + ... + 85786.

Almost surely, 2^2185448680 is an apocalyptic number.

2185448680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2185448680 is an abundant number, since it is smaller than the sum of its proper divisors (2744486720).

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

2185448680 is a wasteful number, since it uses less digits than its factorization.

2185448680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140853 (or 140849 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 46.

The square root of 2185448680 is about 46748.7826579474. The cubic root of 2185448680 is about 1297.7176283887.

The spelling of 2185448680 in words is "two billion, one hundred eighty-five million, four hundred forty-eight thousand, six hundred eighty".