820168762 has 12 divisors (see below), whose sum is σ = 1431110970. Its totient is φ = 351500856.

The previous prime is 820168717. The next prime is 820168777. The reversal of 820168762 is 267861028.

It can be written as a sum of positive squares in only one way, i.e., 782824441 + 37344321 = 27979^2 + 6111^2 .

It is a super-2 number, since 2×820168762² = 1345353596321225288, which contains 22 as substring.

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 in 5 ways as a sum of consecutive naturals, for example, 4184437 + ... + 4184632.

Almost surely, 2^820168762 is an apocalyptic number.

820168762 is a deficient number, since it is larger than the sum of its proper divisors (610942208).

820168762 is a wasteful number, since it uses less digits than its factorization.

820168762 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8369085 (or 8369078 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 820168762 is about 28638.5886872939. The cubic root of 820168762 is about 936.0543691176.

The spelling of 820168762 in words is "eight hundred twenty million, one hundred sixty-eight thousand, seven hundred sixty-two".