79639444 has 6 divisors (see below), whose sum is σ = 139369034. Its totient is φ = 39819720.

The previous prime is 79639421. The next prime is 79639447. The reversal of 79639444 is 44493697.

It can be written as a sum of positive squares in only one way, i.e., 77651344 + 1988100 = 8812^2 + 1410^2 .

It is a junction number, because it is equal to n+sod(n) for n = 79639394 and 79639403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79639447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9954927 + ... + 9954934.

Almost surely, 2^79639444 is an apocalyptic number.

It is an amenable number.

79639444 is a deficient number, since it is larger than the sum of its proper divisors (59729590).

79639444 is a wasteful number, since it uses less digits than its factorization.

79639444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19909865 (or 19909863 counting only the distinct ones).

The product of its digits is 653184, while the sum is 46.

The square root of 79639444 is about 8924.0934553600. The cubic root of 79639444 is about 430.2386344430.

The spelling of 79639444 in words is "seventy-nine million, six hundred thirty-nine thousand, four hundred forty-four".