216078826 has 16 divisors (see below), whose sum is σ = 338272200. Its totient is φ = 103387648.

The previous prime is 216078817. The next prime is 216078829. The reversal of 216078826 is 628870612.

216078826 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 111323601 + 104755225 = 10551^2 + 10235^2 .

It is not an unprimeable number, because it can be changed into a prime (216078829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9931 + ... + 23038.

Almost surely, 2^216078826 is an apocalyptic number.

216078826 is a deficient number, since it is larger than the sum of its proper divisors (122193374).

216078826 is a wasteful number, since it uses less digits than its factorization.

216078826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33113.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 216078826 is about 14699.6199270593. The cubic root of 216078826 is about 600.0729781603.

The spelling of 216078826 in words is "two hundred sixteen million, seventy-eight thousand, eight hundred twenty-six".