771630928 has 20 divisors (see below), whose sum is σ = 1509010560. Its totient is φ = 382208864.

The previous prime is 771630883. The next prime is 771630929. The reversal of 771630928 is 829036177.

It is a happy number.

It is a super-2 number, since 2×771630928² = 1190828578092282368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771630929) 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, 223648 + ... + 227071.

It is an arithmetic number, because the mean of its divisors is an integer number (75450528).

Almost surely, 2^771630928 is an apocalyptic number.

It is an amenable number.

771630928 is a deficient number, since it is larger than the sum of its proper divisors (737379632).

771630928 is a wasteful number, since it uses less digits than its factorization.

771630928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 450834 (or 450828 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 771630928 is about 27778.2455889496. The cubic root of 771630928 is about 917.2123114093.

The spelling of 771630928 in words is "seven hundred seventy-one million, six hundred thirty thousand, nine hundred twenty-eight".