820820674 has 8 divisors (see below), whose sum is σ = 1231369020. Its totient is φ = 410364336.

The previous prime is 820820659. The next prime is 820820677. The reversal of 820820674 is 476028028.

820820674 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 632170449 + 188650225 = 25143^2 + 13735^2 .

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

It is not an unprimeable number, because it can be changed into a prime (820820677) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7272 + ... + 41164.

Almost surely, 2^820820674 is an apocalyptic number.

820820674 is a deficient number, since it is larger than the sum of its proper divisors (410548346).

820820674 is a wasteful number, since it uses less digits than its factorization.

820820674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46004.

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 820820674 is about 28649.9681326175. The cubic root of 820820674 is about 936.3023113689.

It can be divided in two parts, 8208 and 20674, that added together give a palindrome (28882).

The spelling of 820820674 in words is "eight hundred twenty million, eight hundred twenty thousand, six hundred seventy-four".