780340 has 24 divisors (see below), whose sum is σ = 1788192. Its totient is φ = 283680.

The previous prime is 780323. The next prime is 780343. The reversal of 780340 is 43087.

780340 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 (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554 + ... + 1993.

It is an arithmetic number, because the mean of its divisors is an integer number (74508).

2⁷⁸⁰³⁴⁰ is an apocalyptic number.

It is an amenable number.

780340 is an abundant number, since it is smaller than the sum of its proper divisors (1007852).

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

780340 is a wasteful number, since it uses less digits than its factorization.

780340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567 (or 3565 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 780340 is about 883.3685527570. The cubic root of 780340 is about 92.0650139070.

The spelling of 780340 in words is "seven hundred eighty thousand, three hundred forty".