2145880860 has 48 divisors (see below), whose sum is σ = 6170863776. Its totient is φ = 556768512.

The previous prime is 2145880831. The next prime is 2145880937. The reversal of 2145880860 is 680885412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481087 + ... + 485526.

It is an arithmetic number, because the mean of its divisors is an integer number (128559662).

Almost surely, 2^2145880860 is an apocalyptic number.

2145880860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145880860 is an abundant number, since it is smaller than the sum of its proper divisors (4024982916).

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

2145880860 is a wasteful number, since it uses less digits than its factorization.

2145880860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 966662 (or 966660 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 2145880860 is about 46323.6533533356. The cubic root of 2145880860 is about 1289.8381023913.

The spelling of 2145880860 in words is "two billion, one hundred forty-five million, eight hundred eighty thousand, eight hundred sixty".