77320522 has 16 divisors (see below), whose sum is σ = 123255432. Its totient is φ = 36252160.

The previous prime is 77320511. The next prime is 77320531. The reversal of 77320522 is 22502377.

It can be written as a sum of positive squares in 4 ways, for example, as 74666881 + 2653641 = 8641^2 + 1629^2 .

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 7 ways as a sum of consecutive naturals, for example, 5508 + ... + 13600.

Almost surely, 2^77320522 is an apocalyptic number.

77320522 is a deficient number, since it is larger than the sum of its proper divisors (45934910).

77320522 is a wasteful number, since it uses less digits than its factorization.

77320522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8393.

The product of its (nonzero) digits is 5880, while the sum is 28.

The square root of 77320522 is about 8793.2088568395. The cubic root of 77320522 is about 426.0215738448.

Adding to 77320522 its reverse (22502377), we get a palindrome (99822899).

The spelling of 77320522 in words is "seventy-seven million, three hundred twenty thousand, five hundred twenty-two".