216444264 has 16 divisors (see below), whose sum is σ = 541110720. Its totient is φ = 72148080.

The previous prime is 216444253. The next prime is 216444271. The reversal of 216444264 is 462444612.

216444264 is nontrivially palindromic in base 5.

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 3 ways as a sum of consecutive naturals, for example, 4509232 + ... + 4509279.

It is an arithmetic number, because the mean of its divisors is an integer number (33819420).

Almost surely, 2^216444264 is an apocalyptic number.

216444264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216444264 is an abundant number, since it is smaller than the sum of its proper divisors (324666456).

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

216444264 is a wasteful number, since it uses less digits than its factorization.

216444264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9018520 (or 9018516 counting only the distinct ones).

The product of its digits is 36864, while the sum is 33.

The square root of 216444264 is about 14712.0448612693. The cubic root of 216444264 is about 600.4110738550.

Adding to 216444264 its reverse (462444612), we get a palindrome (678888876).

The spelling of 216444264 in words is "two hundred sixteen million, four hundred forty-four thousand, two hundred sixty-four".