77122868 has 6 divisors (see below), whose sum is σ = 134965026. Its totient is φ = 38561432.

The previous prime is 77122867. The next prime is 77122879. The reversal of 77122868 is 86822177.

It can be written as a sum of positive squares in only one way, i.e., 63075364 + 14047504 = 7942^2 + 3748^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77122867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9640355 + ... + 9640362.

It is an arithmetic number, because the mean of its divisors is an integer number (22494171).

Almost surely, 2^77122868 is an apocalyptic number.

It is an amenable number.

77122868 is a deficient number, since it is larger than the sum of its proper divisors (57842158).

77122868 is a wasteful number, since it uses less digits than its factorization.

77122868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19280721 (or 19280719 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 77122868 is about 8781.9626507974. The cubic root of 77122868 is about 425.6582519269.

The spelling of 77122868 in words is "seventy-seven million, one hundred twenty-two thousand, eight hundred sixty-eight".