80644 has 6 divisors (see below), whose sum is σ = 141134. Its totient is φ = 40320.

The previous prime is 80629. The next prime is 80651. The reversal of 80644 is 44608.

It can be written as a sum of positive squares in only one way, i.e., 72900 + 7744 = 270^2 + 88^2 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 80644.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10077 + ... + 10084.

2⁸⁰⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

80644 is a deficient number, since it is larger than the sum of its proper divisors (60490).

80644 is a wasteful number, since it uses less digits than its factorization.

80644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20165 (or 20163 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 80644 is about 283.9788724536. The cubic root of 80644 is about 43.2040062585.

The spelling of 80644 in words is "eighty thousand, six hundred forty-four".