2172724860 has 48 divisors (see below), whose sum is σ = 6403824000. Its totient is φ = 548898624.

The previous prime is 2172724823. The next prime is 2172724867. The reversal of 2172724860 is 684272712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172724867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951810 + ... + 954089.

It is an arithmetic number, because the mean of its divisors is an integer number (133413000).

Almost surely, 2^2172724860 is an apocalyptic number.

2172724860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172724860 is an abundant number, since it is smaller than the sum of its proper divisors (4231099140).

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

2172724860 is a wasteful number, since it uses less digits than its factorization.

2172724860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905930 (or 1905928 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 2172724860 is about 46612.4968222042. The cubic root of 2172724860 is about 1295.1942603488.

The spelling of 2172724860 in words is "two billion, one hundred seventy-two million, seven hundred twenty-four thousand, eight hundred sixty".