216765724 has 12 divisors (see below), whose sum is σ = 433531504. Its totient is φ = 92899584.

The previous prime is 216765701. The next prime is 216765727. The reversal of 216765724 is 427567612.

216765724 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

216765724 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216765727) 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, 3870789 + ... + 3870844.

Almost surely, 2^216765724 is an apocalyptic number.

It is an amenable number.

216765724 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

216765724 is a wasteful number, since it uses less digits than its factorization.

216765724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7741644 (or 7741642 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 216765724 is about 14722.9658696881. The cubic root of 216765724 is about 600.7081675394.

The spelling of 216765724 in words is "two hundred sixteen million, seven hundred sixty-five thousand, seven hundred twenty-four".