765840216 has 16 divisors (see below), whose sum is σ = 1914600600. Its totient is φ = 255280064.

The previous prime is 765840209. The next prime is 765840221. The reversal of 765840216 is 612048567.

It is a super-2 number, since 2×765840216² = 1173022472885853312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15954981 + ... + 15955028.

Almost surely, 2^765840216 is an apocalyptic number.

It is an amenable number.

765840216 is an abundant number, since it is smaller than the sum of its proper divisors (1148760384).

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

765840216 is a wasteful number, since it uses less digits than its factorization.

765840216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31910018 (or 31910014 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 765840216 is about 27673.8182403513. The cubic root of 765840216 is about 914.9121382385.

It can be divided in two parts, 7658 and 40216, that added together give a palindrome (47874).

The spelling of 765840216 in words is "seven hundred sixty-five million, eight hundred forty thousand, two hundred sixteen".