773405856 has 72 divisors (see below), whose sum is σ = 2270346624. Its totient is φ = 249482880.

The previous prime is 773405851. The next prime is 773405909. The reversal of 773405856 is 658504377.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (773405851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34386 + ... + 52241.

It is an arithmetic number, because the mean of its divisors is an integer number (31532592).

Almost surely, 2^773405856 is an apocalyptic number.

It is an amenable number.

773405856 is an abundant number, since it is smaller than the sum of its proper divisors (1496940768).

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

773405856 is a wasteful number, since it uses less digits than its factorization.

773405856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86674 (or 86663 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 773405856 is about 27810.1754039776. The cubic root of 773405856 is about 917.9150390564.

The spelling of 773405856 in words is "seven hundred seventy-three million, four hundred five thousand, eight hundred fifty-six".