780545280 has 288 divisors, whose sum is σ = 2637250560. Its totient is φ = 196485120.

The previous prime is 780545267. The next prime is 780545287. The reversal of 780545280 is 82545087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (780545287) 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 31 ways as a sum of consecutive naturals, for example, 9404119 + ... + 9404201.

It is an arithmetic number, because the mean of its divisors is an integer number (9157120).

Almost surely, 2^780545280 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 780545280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1318625280).

780545280 is an abundant number, since it is smaller than the sum of its proper divisors (1856705280).

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

780545280 is a wasteful number, since it uses less digits than its factorization.

780545280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 780545280 is about 27938.2404599860. The cubic root of 780545280 is about 920.7308622122.

The spelling of 780545280 in words is "seven hundred eighty million, five hundred forty-five thousand, two hundred eighty".