770628644 has 12 divisors (see below), whose sum is σ = 1350848268. Its totient is φ = 384672000.

The previous prime is 770628643. The next prime is 770628697. The reversal of 770628644 is 446826077.

It can be written as a sum of positive squares in 2 ways, for example, as 470022400 + 300606244 = 21680^2 + 17338^2 .

It is a junction number, because it is equal to n+sod(n) for n = 770628595 and 770628604.

It is not an unprimeable number, because it can be changed into a prime (770628641) 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, 157877 + ... + 162684.

It is an arithmetic number, because the mean of its divisors is an integer number (112570689).

Almost surely, 2^770628644 is an apocalyptic number.

It is an amenable number.

770628644 is a deficient number, since it is larger than the sum of its proper divisors (580219624).

770628644 is a wasteful number, since it uses less digits than its factorization.

770628644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321166 (or 321164 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 44.

The square root of 770628644 is about 27760.1989185957. The cubic root of 770628644 is about 916.8150119955.

The spelling of 770628644 in words is "seven hundred seventy million, six hundred twenty-eight thousand, six hundred forty-four".