216900072 has 32 divisors (see below), whose sum is σ = 602500800. Its totient is φ = 72299952.

The previous prime is 216900071. The next prime is 216900113. The reversal of 216900072 is 270009612.

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 (216900071) 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, 501868 + ... + 502299.

It is an arithmetic number, because the mean of its divisors is an integer number (18828150).

Almost surely, 2^216900072 is an apocalyptic number.

It is an amenable number.

216900072 is an abundant number, since it is smaller than the sum of its proper divisors (385600728).

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

216900072 is a wasteful number, since it uses less digits than its factorization.

216900072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1004182 (or 1004172 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 216900072 is about 14727.5276947626. The cubic root of 216900072 is about 600.8322450798.

Adding to 216900072 its reverse (270009612), we get a palindrome (486909684).

The spelling of 216900072 in words is "two hundred sixteen million, nine hundred thousand, seventy-two".