770128 has 20 divisors (see below), whose sum is σ = 1507840. Its totient is φ = 381024.

The previous prime is 770123. The next prime is 770129. The reversal of 770128 is 821077.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (770123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1843 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (75392).

2⁷⁷⁰¹²⁸ is an apocalyptic number.

It is an amenable number.

770128 is a deficient number, since it is larger than the sum of its proper divisors (737712).

770128 is a wasteful number, since it uses less digits than its factorization.

770128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 770128 is about 877.5693704773. The cubic root of 770128 is about 91.6616430672.

It can be divided in two parts, 770 and 128, that added together give a palindrome (898).

The spelling of 770128 in words is "seven hundred seventy thousand, one hundred twenty-eight".