77389216 has 24 divisors (see below), whose sum is σ = 152776260. Its totient is φ = 38588928.

The previous prime is 77389201. The next prime is 77389229. The reversal of 77389216 is 61298377.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77369616 + 19600 = 8796^2 + 140^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9340 + ... + 15556.

Almost surely, 2^77389216 is an apocalyptic number.

It is an amenable number.

77389216 is a deficient number, since it is larger than the sum of its proper divisors (75387044).

77389216 is a wasteful number, since it uses less digits than its factorization.

77389216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6616 (or 6608 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 77389216 is about 8797.1140722398. The cubic root of 77389216 is about 426.1477001858.

The spelling of 77389216 in words is "seventy-seven million, three hundred eighty-nine thousand, two hundred sixteen".