780340860 has 72 divisors (see below), whose sum is σ = 2549121120. Its totient is φ = 192083328.

The previous prime is 780340843. The next prime is 780340861. The reversal of 780340860 is 68043087.

780340860 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780340861) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164400 + ... + 169079.

It is an arithmetic number, because the mean of its divisors is an integer number (35404460).

Almost surely, 2^780340860 is an apocalyptic number.

It is an amenable number.

780340860 is an abundant number, since it is smaller than the sum of its proper divisors (1768780260).

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

780340860 is a wasteful number, since it uses less digits than its factorization.

780340860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333507 (or 333502 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 780340860 is about 27934.5817938984. The cubic root of 780340860 is about 920.6504772809.

The spelling of 780340860 in words is "seven hundred eighty million, three hundred forty thousand, eight hundred sixty".