2172660280 has 64 divisors (see below), whose sum is σ = 5779512000. Its totient is φ = 719222784.

The previous prime is 2172660271. The next prime is 2172660289. The reversal of 2172660280 is 820662712.

It is an interprime number because it is at equal distance from previous prime (2172660271) and next prime (2172660289).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172660289) 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, 125665 + ... + 141904.

It is an arithmetic number, because the mean of its divisors is an integer number (90304875).

Almost surely, 2^2172660280 is an apocalyptic number.

2172660280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2172660280 is an abundant number, since it is smaller than the sum of its proper divisors (3606851720).

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

2172660280 is a wasteful number, since it uses less digits than its factorization.

2172660280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267616 (or 267612 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 2172660280 is about 46611.8040843733. The cubic root of 2172660280 is about 1295.1814278489.

The spelling of 2172660280 in words is "two billion, one hundred seventy-two million, six hundred sixty thousand, two hundred eighty".