216326740 has 96 divisors (see below), whose sum is σ = 536465664. Its totient is φ = 71746560.

The previous prime is 216326729. The next prime is 216326743. The reversal of 216326740 is 47623612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216326743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 623247 + ... + 623593.

It is an arithmetic number, because the mean of its divisors is an integer number (5588184).

Almost surely, 2^216326740 is an apocalyptic number.

216326740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216326740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (268232832).

216326740 is an abundant number, since it is smaller than the sum of its proper divisors (320138924).

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

216326740 is a wasteful number, since it uses less digits than its factorization.

216326740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 216326740 is about 14708.0501766890. The cubic root of 216326740 is about 600.3023846173.

The spelling of 216326740 in words is "two hundred sixteen million, three hundred twenty-six thousand, seven hundred forty".