75644444 has 6 divisors (see below), whose sum is σ = 132377784. Its totient is φ = 37822220.

The previous prime is 75644419. The next prime is 75644483. The reversal of 75644444 is 44444657.

It is a happy number.

75644444 is a modest number, since divided by 44444 gives 756 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 75644398 and 75644407.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9455552 + ... + 9455559.

It is an arithmetic number, because the mean of its divisors is an integer number (22062964).

Almost surely, 2^75644444 is an apocalyptic number.

It is an amenable number.

75644444 is a deficient number, since it is larger than the sum of its proper divisors (56733340).

75644444 is a wasteful number, since it uses less digits than its factorization.

75644444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18911115 (or 18911113 counting only the distinct ones).

The product of its digits is 215040, while the sum is 38.

The square root of 75644444 is about 8697.3814450098. The cubic root of 75644444 is about 422.9207675186.

The spelling of 75644444 in words is "seventy-five million, six hundred forty-four thousand, four hundred forty-four".