780766540 has 12 divisors (see below), whose sum is σ = 1639609776. Its totient is φ = 312306608.

The previous prime is 780766537. The next prime is 780766541. The reversal of 780766540 is 45667087.

It is not an unprimeable number, because it can be changed into a prime (780766541) 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, 19519144 + ... + 19519183.

It is an arithmetic number, because the mean of its divisors is an integer number (136634148).

Almost surely, 2^780766540 is an apocalyptic number.

It is an amenable number.

780766540 is an abundant number, since it is smaller than the sum of its proper divisors (858843236).

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

780766540 is a wasteful number, since it uses less digits than its factorization.

780766540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39038336 (or 39038334 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 43.

The square root of 780766540 is about 27942.1999849690. The cubic root of 780766540 is about 920.8178533919.

It can be divided in two parts, 7807 and 66540, that added together give a palindrome (74347).

The spelling of 780766540 in words is "seven hundred eighty million, seven hundred sixty-six thousand, five hundred forty".