168215980 has 12 divisors (see below), whose sum is σ = 353253600. Its totient is φ = 67286384.

The previous prime is 168215977. The next prime is 168216019. The reversal of 168215980 is 89512861.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4205380 + ... + 4205419.

It is an arithmetic number, because the mean of its divisors is an integer number (29437800).

Almost surely, 2^168215980 is an apocalyptic number.

168215980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

168215980 is an abundant number, since it is smaller than the sum of its proper divisors (185037620).

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

168215980 is a wasteful number, since it uses less digits than its factorization.

168215980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8410808 (or 8410806 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 40.

The square root of 168215980 is about 12969.8103301475. The cubic root of 168215980 is about 552.0211913380.

It can be divided in two parts, 16821 and 5980, that added together give a square (22801 = 151²).

The spelling of 168215980 in words is "one hundred sixty-eight million, two hundred fifteen thousand, nine hundred eighty".