780104 has 24 divisors (see below), whose sum is σ = 1586610. Its totient is φ = 359424.

The previous prime is 780061. The next prime is 780119. The reversal of 780104 is 401087.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 643204 + 136900 = 802^2 + 370^2 .

It is a congruent number.

It is an unprimeable number.

780104 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1064 + ... + 1640.

2⁷⁸⁰¹⁰⁴ 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 780104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (793305).

780104 is an abundant number, since it is smaller than the sum of its proper divisors (806506).

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

780104 is a wasteful number, since it uses less digits than its factorization.

780104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609 (or 592 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 780104 is about 883.2349630761. The cubic root of 780104 is about 92.0557318274.

The spelling of 780104 in words is "seven hundred eighty thousand, one hundred four".