77918828 has 12 divisors (see below), whose sum is σ = 146847120. Its totient is φ = 35962512.

The previous prime is 77918821. The next prime is 77918833. The reversal of 77918828 is 82881977.

It is a happy number.

77918828 is nontrivially palindromic in base 8.

It is not an unprimeable number, because it can be changed into a prime (77918821) 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 3 ways as a sum of consecutive naturals, for example, 749168 + ... + 749271.

It is an arithmetic number, because the mean of its divisors is an integer number (12237260).

Almost surely, 2^77918828 is an apocalyptic number.

It is an amenable number.

77918828 is a deficient number, since it is larger than the sum of its proper divisors (68928292).

77918828 is a wasteful number, since it uses less digits than its factorization.

77918828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1498456 (or 1498454 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 77918828 is about 8827.1642105492. The cubic root of 77918828 is about 427.1176029441.

The spelling of 77918828 in words is "seventy-seven million, nine hundred eighteen thousand, eight hundred twenty-eight".