77785714 has 16 divisors (see below), whose sum is σ = 120965400. Its totient is φ = 37469824.

The previous prime is 77785711. The next prime is 77785751. The reversal of 77785714 is 41758777.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42680089 + 35105625 = 6533^2 + 5925^2 .

It is not an unprimeable number, because it can be changed into a prime (77785711) 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 7 ways as a sum of consecutive naturals, for example, 31824 + ... + 34180.

Almost surely, 2^77785714 is an apocalyptic number.

77785714 is a deficient number, since it is larger than the sum of its proper divisors (43179686).

77785714 is a wasteful number, since it uses less digits than its factorization.

77785714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957.

The product of its digits is 384160, while the sum is 46.

The square root of 77785714 is about 8819.6209669124. The cubic root of 77785714 is about 426.8742396842.

The spelling of 77785714 in words is "seventy-seven million, seven hundred eighty-five thousand, seven hundred fourteen".