77509868 has 12 divisors (see below), whose sum is σ = 143621352. Its totient is φ = 36475200.

The previous prime is 77509849. The next prime is 77509871. The reversal of 77509868 is 86890577.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569858 + ... + 569993.

It is an arithmetic number, because the mean of its divisors is an integer number (11968446).

Almost surely, 2^77509868 is an apocalyptic number.

It is an amenable number.

77509868 is a deficient number, since it is larger than the sum of its proper divisors (66111484).

77509868 is a wasteful number, since it uses less digits than its factorization.

77509868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139872 (or 1139870 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 50.

The square root of 77509868 is about 8803.9688777278. The cubic root of 77509868 is about 426.3690440140.

The spelling of 77509868 in words is "seventy-seven million, five hundred nine thousand, eight hundred sixty-eight".