820560444 has 24 divisors (see below), whose sum is σ = 2088699648. Its totient is φ = 248654640.

The previous prime is 820560413. The next prime is 820560463. The reversal of 820560444 is 444065028.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 3108052 + ... + 3108315.

It is an arithmetic number, because the mean of its divisors is an integer number (87029152).

Almost surely, 2^820560444 is an apocalyptic number.

It is an amenable number.

820560444 is an abundant number, since it is smaller than the sum of its proper divisors (1268139204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

820560444 is a wasteful number, since it uses less digits than its factorization.

820560444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6216385 (or 6216383 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 820560444 is about 28645.4262317739. The cubic root of 820560444 is about 936.2033536177.

The spelling of 820560444 in words is "eight hundred twenty million, five hundred sixty thousand, four hundred forty-four".