172216860 has 48 divisors (see below), whose sum is σ = 482842752. Its totient is φ = 45864000.

The previous prime is 172216843. The next prime is 172216909. The reversal of 172216860 is 68612271.

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, 61695 + ... + 64425.

It is an arithmetic number, because the mean of its divisors is an integer number (10059224).

Almost surely, 2^172216860 is an apocalyptic number.

172216860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172216860 is an abundant number, since it is smaller than the sum of its proper divisors (310625892).

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

172216860 is a wasteful number, since it uses less digits than its factorization.

172216860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3794 (or 3792 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 172216860 is about 13123.1421542251. The cubic root of 172216860 is about 556.3634038869.

The spelling of 172216860 in words is "one hundred seventy-two million, two hundred sixteen thousand, eight hundred sixty".