216484764 has 12 divisors (see below), whose sum is σ = 505131144. Its totient is φ = 72161584.

The previous prime is 216484759. The next prime is 216484769. The reversal of 216484764 is 467484612.

It is an interprime number because it is at equal distance from previous prime (216484759) and next prime (216484769).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216484769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9020187 + ... + 9020210.

It is an arithmetic number, because the mean of its divisors is an integer number (42094262).

Almost surely, 2^216484764 is an apocalyptic number.

It is an amenable number.

216484764 is an abundant number, since it is smaller than the sum of its proper divisors (288646380).

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

216484764 is a wasteful number, since it uses less digits than its factorization.

216484764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18040404 (or 18040402 counting only the distinct ones).

The product of its digits is 258048, while the sum is 42.

The square root of 216484764 is about 14713.4212200970. The cubic root of 216484764 is about 600.4485201881.

The spelling of 216484764 in words is "two hundred sixteen million, four hundred eighty-four thousand, seven hundred sixty-four".