216026644 has 6 divisors (see below), whose sum is σ = 378046634. Its totient is φ = 108013320.

The previous prime is 216026641. The next prime is 216026677. The reversal of 216026644 is 446620612.

It can be written as a sum of positive squares in only one way, i.e., 186650244 + 29376400 = 13662^2 + 5420^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216026641) by changing a digit.

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 as a sum of consecutive naturals, namely, 27003327 + ... + 27003334.

Almost surely, 2^216026644 is an apocalyptic number.

It is an amenable number.

216026644 is a deficient number, since it is larger than the sum of its proper divisors (162019990).

216026644 is a wasteful number, since it uses less digits than its factorization.

216026644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54006665 (or 54006663 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 216026644 is about 14697.8448760354. The cubic root of 216026644 is about 600.0246693561.

The spelling of 216026644 in words is "two hundred sixteen million, twenty-six thousand, six hundred forty-four".