77307868 has 36 divisors (see below), whose sum is σ = 149607976. Its totient is φ = 34927200.

The previous prime is 77307859. The next prime is 77307869. The reversal of 77307868 is 86870377.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77307869) 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 11 ways as a sum of consecutive naturals, for example, 101746 + ... + 102502.

Almost surely, 2^77307868 is an apocalyptic number.

It is an amenable number.

77307868 is a deficient number, since it is larger than the sum of its proper divisors (72300108).

77307868 is a wasteful number, since it uses less digits than its factorization.

77307868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 981 counting only the distinct ones).

The product of its (nonzero) digits is 395136, while the sum is 46.

The square root of 77307868 is about 8792.4892948471. The cubic root of 77307868 is about 425.9983321880.

It can be divided in two parts, 773078 and 68, that added together give a triangular number (773146 = T₁₂₄₃).

The spelling of 77307868 in words is "seventy-seven million, three hundred seven thousand, eight hundred sixty-eight".