216040338 has 16 divisors (see below), whose sum is σ = 480089760. Its totient is φ = 72013428.

The previous prime is 216040277. The next prime is 216040339. The reversal of 216040338 is 833040612.

It is a happy number.

216040338 is a `hidden beast` number, since 21 + 604 + 0 + 3 + 38 = 666.

216040338 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (216040339) 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 in 7 ways as a sum of consecutive naturals, for example, 2000320 + ... + 2000427.

It is an arithmetic number, because the mean of its divisors is an integer number (30005610).

Almost surely, 2^216040338 is an apocalyptic number.

216040338 is an abundant number, since it is smaller than the sum of its proper divisors (264049422).

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

216040338 is a wasteful number, since it uses less digits than its factorization.

216040338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000758 (or 4000752 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 216040338 is about 14698.3107192629. The cubic root of 216040338 is about 600.0373476752.

The spelling of 216040338 in words is "two hundred sixteen million, forty thousand, three hundred thirty-eight".