216764772 has 48 divisors (see below), whose sum is σ = 596692992. Its totient is φ = 59934240.

The previous prime is 216764767. The next prime is 216764789. The reversal of 216764772 is 277467612.

216764772 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

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, 39018 + ... + 44225.

It is an arithmetic number, because the mean of its divisors is an integer number (12431104).

Almost surely, 2^216764772 is an apocalyptic number.

It is an amenable number.

216764772 is an abundant number, since it is smaller than the sum of its proper divisors (379928220).

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

216764772 is a wasteful number, since it uses less digits than its factorization.

216764772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83288 (or 83286 counting only the distinct ones).

The product of its digits is 197568, while the sum is 42.

The square root of 216764772 is about 14722.9335392102. The cubic root of 216764772 is about 600.7072881338.

The spelling of 216764772 in words is "two hundred sixteen million, seven hundred sixty-four thousand, seven hundred seventy-two".