77107444 has 12 divisors (see below), whose sum is σ = 142875684. Its totient is φ = 36285824.

The previous prime is 77107441. The next prime is 77107469. The reversal of 77107444 is 44470177.

It can be written as a sum of positive squares in 2 ways, for example, as 61027344 + 16080100 = 7812^2 + 4010^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77107441) 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, 566899 + ... + 567034.

It is an arithmetic number, because the mean of its divisors is an integer number (11906307).

Almost surely, 2^77107444 is an apocalyptic number.

It is an amenable number.

77107444 is a deficient number, since it is larger than the sum of its proper divisors (65768240).

77107444 is a wasteful number, since it uses less digits than its factorization.

77107444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133954 (or 1133952 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 34.

The square root of 77107444 is about 8781.0844432792. The cubic root of 77107444 is about 425.6298738735.

The spelling of 77107444 in words is "seventy-seven million, one hundred seven thousand, four hundred forty-four".