77758768 has 30 divisors (see below), whose sum is σ = 157509884. Its totient is φ = 37184928.

The previous prime is 77758741. The next prime is 77758771. The reversal of 77758768 is 86785777.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3871 + ... + 13057.

Almost surely, 2^77758768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77758768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78754942).

77758768 is an abundant number, since it is smaller than the sum of its proper divisors (79751116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77758768 is a wasteful number, since it uses less digits than its factorization.

77758768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9241 (or 9212 counting only the distinct ones).

The product of its digits is 4609920, while the sum is 55.

The square root of 77758768 is about 8818.0932179242. The cubic root of 77758768 is about 426.8249423641.

The spelling of 77758768 in words is "seventy-seven million, seven hundred fifty-eight thousand, seven hundred sixty-eight".