765791540 has 24 divisors (see below), whose sum is σ = 1609308960. Its totient is φ = 306098208.

The previous prime is 765791531. The next prime is 765791557. The reversal of 765791540 is 45197567.

It is a junction number, because it is equal to n+sod(n) for n = 765791491 and 765791500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16751 + ... + 42569.

It is an arithmetic number, because the mean of its divisors is an integer number (67054540).

Almost surely, 2^765791540 is an apocalyptic number.

It is an amenable number.

765791540 is an abundant number, since it is smaller than the sum of its proper divisors (843517420).

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

765791540 is a wasteful number, since it uses less digits than its factorization.

765791540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27311 (or 27309 counting only the distinct ones).

The product of its (nonzero) digits is 264600, while the sum is 44.

The square root of 765791540 is about 27672.9387669615. The cubic root of 765791540 is about 914.8927542095.

The spelling of 765791540 in words is "seven hundred sixty-five million, seven hundred ninety-one thousand, five hundred forty".