77447716 has 36 divisors (see below), whose sum is σ = 150086412. Its totient is φ = 34845184.

The previous prime is 77447627. The next prime is 77447717. The reversal of 77447716 is 61774477.

It can be written as a sum of positive squares in 2 ways, for example, as 30470400 + 46977316 = 5520^2 + 6854^2 .

It is not an unprimeable number, because it can be changed into a prime (77447717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34896 + ... + 37048.

It is an arithmetic number, because the mean of its divisors is an integer number (4169067).

Almost surely, 2^77447716 is an apocalyptic number.

It is an amenable number.

77447716 is a deficient number, since it is larger than the sum of its proper divisors (72638696).

77447716 is a wasteful number, since it uses less digits than its factorization.

77447716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2220 (or 2195 counting only the distinct ones).

The product of its digits is 230496, while the sum is 43.

The square root of 77447716 is about 8800.4383981709. The cubic root of 77447716 is about 426.2550508943.

The spelling of 77447716 in words is "seventy-seven million, four hundred forty-seven thousand, seven hundred sixteen".