216909480 has 64 divisors (see below), whose sum is σ = 671731200. Its totient is φ = 55975680.

The previous prime is 216909467. The next prime is 216909533. The reversal of 216909480 is 84909612.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 25435 + ... + 32874.

It is an arithmetic number, because the mean of its divisors is an integer number (10495800).

Almost surely, 2^216909480 is an apocalyptic number.

216909480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216909480 is an abundant number, since it is smaller than the sum of its proper divisors (454821720).

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

216909480 is a wasteful number, since it uses less digits than its factorization.

216909480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58354 (or 58350 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 216909480 is about 14727.8470931769. The cubic root of 216909480 is about 600.8409319496.

The spelling of 216909480 in words is "two hundred sixteen million, nine hundred nine thousand, four hundred eighty".