77320532 has 12 divisors (see below), whose sum is σ = 135398676. Its totient is φ = 38635200.

The previous prime is 77320531. The next prime is 77320561. The reversal of 77320532 is 23502377.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 69288976 = 2834^2 + 8324^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77320495 and 77320504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77320531) 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 3 ways as a sum of consecutive naturals, for example, 1838 + ... + 12570.

It is an arithmetic number, because the mean of its divisors is an integer number (11283223).

Almost surely, 2^77320532 is an apocalyptic number.

It is an amenable number.

77320532 is a deficient number, since it is larger than the sum of its proper divisors (58078144).

77320532 is a wasteful number, since it uses less digits than its factorization.

77320532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12538 (or 12536 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 29.

The square root of 77320532 is about 8793.2094254601. The cubic root of 77320532 is about 426.0215922108.

The spelling of 77320532 in words is "seventy-seven million, three hundred twenty thousand, five hundred thirty-two".