82230728 has 8 divisors (see below), whose sum is σ = 154182630. Its totient is φ = 41115360.

The previous prime is 82230721. The next prime is 82230737. The reversal of 82230728 is 82703228.

It can be written as a sum of positive squares in only one way, i.e., 44063044 + 38167684 = 6638^2 + 6178^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 82230694 and 82230703.

It is not an unprimeable number, because it can be changed into a prime (82230721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5139413 + ... + 5139428.

Almost surely, 2^82230728 is an apocalyptic number.

It is an amenable number.

82230728 is a deficient number, since it is larger than the sum of its proper divisors (71951902).

82230728 is a wasteful number, since it uses less digits than its factorization.

82230728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10278847 (or 10278843 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 82230728 is about 9068.1160116090. The cubic root of 82230728 is about 434.8552440352.

The spelling of 82230728 in words is "eighty-two million, two hundred thirty thousand, seven hundred twenty-eight".