820115474 has 8 divisors (see below), whose sum is σ = 1233336780. Its totient is φ = 409003216.

The previous prime is 820115453. The next prime is 820115477. The reversal of 820115474 is 474511028.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 806844025 + 13271449 = 28405^2 + 3643^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 820115474.

It is not an unprimeable number, because it can be changed into a prime (820115477) 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, 526289 + ... + 527844.

Almost surely, 2^820115474 is an apocalyptic number.

820115474 is a deficient number, since it is larger than the sum of its proper divisors (413221306).

820115474 is a wasteful number, since it uses less digits than its factorization.

820115474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1054524.

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 820115474 is about 28637.6583190735. The cubic root of 820115474 is about 936.0340962389.

The spelling of 820115474 in words is "eight hundred twenty million, one hundred fifteen thousand, four hundred seventy-four".