216848740 has 12 divisors (see below), whose sum is σ = 455382396. Its totient is φ = 86739488.

The previous prime is 216848683. The next prime is 216848743. The reversal of 216848740 is 47848612.

It can be written as a sum of positive squares in 2 ways, for example, as 128187684 + 88661056 = 11322^2 + 9416^2 .

It is a junction number, because it is equal to n+sod(n) for n = 216848693 and 216848702.

It is not an unprimeable number, because it can be changed into a prime (216848743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5421199 + ... + 5421238.

It is an arithmetic number, because the mean of its divisors is an integer number (37948533).

Almost surely, 2^216848740 is an apocalyptic number.

216848740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216848740 is an abundant number, since it is smaller than the sum of its proper divisors (238533656).

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

216848740 is a wasteful number, since it uses less digits than its factorization.

216848740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10842446 (or 10842444 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The square root of 216848740 is about 14725.7848687260. The cubic root of 216848740 is about 600.7848432911.

The spelling of 216848740 in words is "two hundred sixteen million, eight hundred forty-eight thousand, seven hundred forty".