216736992 has 48 divisors (see below), whose sum is σ = 632152080. Its totient is φ = 72245376.

The previous prime is 216736991. The next prime is 216736997. The reversal of 216736992 is 299637612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216736991) 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 7 ways as a sum of consecutive naturals, for example, 124563 + ... + 126290.

It is an arithmetic number, because the mean of its divisors is an integer number (13169835).

Almost surely, 2^216736992 is an apocalyptic number.

It is an amenable number.

216736992 is an abundant number, since it is smaller than the sum of its proper divisors (415415088).

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

216736992 is a wasteful number, since it uses less digits than its factorization.

216736992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250872 (or 250858 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 216736992 is about 14721.9900828658. The cubic root of 216736992 is about 600.6816253516.

The spelling of 216736992 in words is "two hundred sixteen million, seven hundred thirty-six thousand, nine hundred ninety-two".