820127572 has 12 divisors (see below), whose sum is σ = 1565698176. Its totient is φ = 372785240.

The previous prime is 820127557. The next prime is 820127573. The reversal of 820127572 is 275721028.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820127573) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 9319588 + ... + 9319675.

It is an arithmetic number, because the mean of its divisors is an integer number (130474848).

Almost surely, 2^820127572 is an apocalyptic number.

It is an amenable number.

820127572 is a deficient number, since it is larger than the sum of its proper divisors (745570604).

820127572 is a wasteful number, since it uses less digits than its factorization.

820127572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18639278 (or 18639276 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 820127572 is about 28637.8695436654. The cubic root of 820127572 is about 936.0386988772.

The spelling of 820127572 in words is "eight hundred twenty million, one hundred twenty-seven thousand, five hundred seventy-two".