780520 has 64 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 269568.

The previous prime is 780499. The next prime is 780523. The reversal of 780520 is 25087.

It is a super-2 number, since 2×780520² = 1218422940800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 780491 and 780500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780523) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 9841 + ... + 9919.

It is an arithmetic number, because the mean of its divisors is an integer number (31500).

2⁷⁸⁰⁵²⁰ 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 780520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1008000).

780520 is an abundant number, since it is smaller than the sum of its proper divisors (1235480).

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

780520 is a wasteful number, since it uses less digits than its factorization.

780520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 780520 is about 883.4704296127. The cubic root of 780520 is about 92.0720922013.

The spelling of 780520 in words is "seven hundred eighty thousand, five hundred twenty".