216026320 has 20 divisors (see below), whose sum is σ = 502261380. Its totient is φ = 86410496.

The previous prime is 216026303. The next prime is 216026339. The reversal of 216026320 is 23620612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 64834704 + 151191616 = 8052^2 + 12296^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 216026291 and 216026300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1350085 + ... + 1350244.

It is an arithmetic number, because the mean of its divisors is an integer number (25113069).

Almost surely, 2^216026320 is an apocalyptic number.

216026320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216026320 is an abundant number, since it is smaller than the sum of its proper divisors (286235060).

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

216026320 is a wasteful number, since it uses less digits than its factorization.

216026320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2700342 (or 2700336 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 216026320 is about 14697.8338540072. The cubic root of 216026320 is about 600.0243693806.

Adding to 216026320 its reverse (23620612), we get a palindrome (239646932).

The spelling of 216026320 in words is "two hundred sixteen million, twenty-six thousand, three hundred twenty".