216576980 has 24 divisors (see below), whose sum is σ = 461220480. Its totient is φ = 85410080.

The previous prime is 216576977. The next prime is 216576989. The reversal of 216576980 is 89675612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216576989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74840 + ... + 77679.

It is an arithmetic number, because the mean of its divisors is an integer number (19217520).

Almost surely, 2^216576980 is an apocalyptic number.

216576980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216576980 is an abundant number, since it is smaller than the sum of its proper divisors (244643500).

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

216576980 is a wasteful number, since it uses less digits than its factorization.

216576980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152599 (or 152597 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 216576980 is about 14716.5546239601. The cubic root of 216576980 is about 600.5337657568.

The spelling of 216576980 in words is "two hundred sixteen million, five hundred seventy-six thousand, nine hundred eighty".