768906815 has 16 divisors (see below), whose sum is σ = 932871168. Its totient is φ = 608356896.

The previous prime is 768906811. The next prime is 768906823. The reversal of 768906815 is 518609867.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 768906815 - 2² = 768906811 is a prime.

It is a super-3 number, since 3×768906815³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (768906811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589454 + ... + 590756.

It is an arithmetic number, because the mean of its divisors is an integer number (58304448).

Almost surely, 2^768906815 is an apocalyptic number.

768906815 is a deficient number, since it is larger than the sum of its proper divisors (163964353).

768906815 is a wasteful number, since it uses less digits than its factorization.

768906815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518.

The product of its (nonzero) digits is 725760, while the sum is 50.

The square root of 768906815 is about 27729.1690282994. The cubic root of 768906815 is about 916.1316842362.

The spelling of 768906815 in words is "seven hundred sixty-eight million, nine hundred six thousand, eight hundred fifteen".