77643422 has 16 divisors (see below), whose sum is σ = 120657600. Its totient is φ = 37445760.

The previous prime is 77643421. The next prime is 77643439. The reversal of 77643422 is 22434677.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77643421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1979 + ... + 12617.

It is an arithmetic number, because the mean of its divisors is an integer number (7541100).

Almost surely, 2^77643422 is an apocalyptic number.

77643422 is a deficient number, since it is larger than the sum of its proper divisors (43014178).

77643422 is a wasteful number, since it uses less digits than its factorization.

77643422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10771.

The product of its digits is 56448, while the sum is 35.

The square root of 77643422 is about 8811.5504878540. The cubic root of 77643422 is about 426.6137896983.

The spelling of 77643422 in words is "seventy-seven million, six hundred forty-three thousand, four hundred twenty-two".