82128776 has 8 divisors (see below), whose sum is σ = 153991470. Its totient is φ = 41064384.

The previous prime is 82128743. The next prime is 82128793. The reversal of 82128776 is 67782128.

It can be written as a sum of positive squares in only one way, i.e., 81180100 + 948676 = 9010^2 + 974^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5133041 + ... + 5133056.

Almost surely, 2^82128776 is an apocalyptic number.

It is an amenable number.

82128776 is a deficient number, since it is larger than the sum of its proper divisors (71862694).

82128776 is a wasteful number, since it uses less digits than its factorization.

82128776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10266103 (or 10266099 counting only the distinct ones).

The product of its digits is 75264, while the sum is 41.

The square root of 82128776 is about 9062.4928137903. The cubic root of 82128776 is about 434.6754544039.

The spelling of 82128776 in words is "eighty-two million, one hundred twenty-eight thousand, seven hundred seventy-six".