777377980 has 12 divisors (see below), whose sum is σ = 1632493800. Its totient is φ = 310951184.

The previous prime is 777377941. The next prime is 777377983. The reversal of 777377980 is 89773777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777377983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19434430 + ... + 19434469.

It is an arithmetic number, because the mean of its divisors is an integer number (136041150).

Almost surely, 2^777377980 is an apocalyptic number.

It is an amenable number.

777377980 is an abundant number, since it is smaller than the sum of its proper divisors (855115820).

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

777377980 is a wasteful number, since it uses less digits than its factorization.

777377980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38868908 (or 38868906 counting only the distinct ones).

The product of its (nonzero) digits is 3630312, while the sum is 55.

The square root of 777377980 is about 27881.4988836684. The cubic root of 777377980 is about 919.4837920126.

The spelling of 777377980 in words is "seven hundred seventy-seven million, three hundred seventy-seven thousand, nine hundred eighty".