77722132 has 12 divisors (see below), whose sum is σ = 136157140. Its totient is φ = 38820096.

The previous prime is 77722121. The next prime is 77722133. The reversal of 77722132 is 23122777.

It can be written as a sum of positive squares in 2 ways, for example, as 29224836 + 48497296 = 5406^2 + 6964^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77722094 and 77722103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77722133) 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 3 ways as a sum of consecutive naturals, for example, 5757 + ... + 13732.

Almost surely, 2^77722132 is an apocalyptic number.

It is an amenable number.

77722132 is a deficient number, since it is larger than the sum of its proper divisors (58435008).

77722132 is a wasteful number, since it uses less digits than its factorization.

77722132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20490 (or 20488 counting only the distinct ones).

The product of its digits is 8232, while the sum is 31.

The square root of 77722132 is about 8816.0156533436. The cubic root of 77722132 is about 426.7578990563.

The spelling of 77722132 in words is "seventy-seven million, seven hundred twenty-two thousand, one hundred thirty-two".