780560 has 40 divisors (see below), whose sum is σ = 1982016. Its totient is φ = 283520.

The previous prime is 780553. The next prime is 780583. The reversal of 780560 is 65087.

It is a tau number, because it is divible by the number of its divisors (40).

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, 437 + ... + 1323.

2⁷⁸⁰⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (991008).

780560 is an abundant number, since it is smaller than the sum of its proper divisors (1201456).

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

780560 is a wasteful number, since it uses less digits than its factorization.

780560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 780560 is about 883.4930673186. The cubic root of 780560 is about 92.0736650078.

The spelling of 780560 in words is "seven hundred eighty thousand, five hundred sixty".