77609444 has 12 divisors (see below), whose sum is σ = 148163568. Its totient is φ = 35277000.

The previous prime is 77609419. The next prime is 77609447. The reversal of 77609444 is 44490677.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (77609447) 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, 881882 + ... + 881969.

It is an arithmetic number, because the mean of its divisors is an integer number (12346964).

Almost surely, 2^77609444 is an apocalyptic number.

It is an amenable number.

77609444 is a deficient number, since it is larger than the sum of its proper divisors (70554124).

77609444 is a wasteful number, since it uses less digits than its factorization.

77609444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763866 (or 1763864 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 41.

The square root of 77609444 is about 8809.6222393472. The cubic root of 77609444 is about 426.5515496185.

The spelling of 77609444 in words is "seventy-seven million, six hundred nine thousand, four hundred forty-four".