780874880 has 64 divisors (see below), whose sum is σ = 1931196600. Its totient is φ = 301572096.

The previous prime is 780874859. The next prime is 780874891. The reversal of 780874880 is 88478087.

It can be written as a sum of positive squares in 4 ways, for example, as 411927616 + 368947264 = 20296^2 + 19208^2 .

It is a tau number, because it is divible by the number of its divisors (64).

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, 2477 + ... + 39596.

Almost surely, 2^780874880 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 780874880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (965598300).

780874880 is an abundant number, since it is smaller than the sum of its proper divisors (1150321720).

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

780874880 is a wasteful number, since it uses less digits than its factorization.

780874880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42121 (or 42109 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 50.

The square root of 780874880 is about 27944.1385624964. The cubic root of 780874880 is about 920.8604426454.

The spelling of 780874880 in words is "seven hundred eighty million, eight hundred seventy-four thousand, eight hundred eighty".