820262644 has 12 divisors (see below), whose sum is σ = 1435783300. Its totient is φ = 410038848.

The previous prime is 820262633. The next prime is 820262693. The reversal of 820262644 is 446262028.

820262644 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 61811044 + 758451600 = 7862^2 + 27540^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759 + ... + 40510.

Almost surely, 2^820262644 is an apocalyptic number.

It is an amenable number.

820262644 is a deficient number, since it is larger than the sum of its proper divisors (615520656).

820262644 is a wasteful number, since it uses less digits than its factorization.

820262644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46242 (or 46240 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 820262644 is about 28640.2277225584. The cubic root of 820262644 is about 936.0900834354.

The spelling of 820262644 in words is "eight hundred twenty million, two hundred sixty-two thousand, six hundred forty-four".