778080780 has 288 divisors, whose sum is σ = 2641766400. Its totient is φ = 184550400.

The previous prime is 778080773. The next prime is 778080893. The reversal of 778080780 is 87080877.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable 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 95 ways as a sum of consecutive naturals, for example, 4346731 + ... + 4346909.

It is an arithmetic number, because the mean of its divisors is an integer number (9172800).

Almost surely, 2^778080780 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 778080780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1320883200).

778080780 is an abundant number, since it is smaller than the sum of its proper divisors (1863685620).

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

778080780 is a wasteful number, since it uses less digits than its factorization.

778080780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 280 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 45.

The square root of 778080780 is about 27894.0993760329. The cubic root of 778080780 is about 919.7607995019.

The spelling of 778080780 in words is "seven hundred seventy-eight million, eighty thousand, seven hundred eighty".