820808044 has 24 divisors (see below), whose sum is σ = 1656150048. Its totient is φ = 348660480.

The previous prime is 820808029. The next prime is 820808081. The reversal of 820808044 is 440808028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126547 + ... + 132874.

It is an arithmetic number, because the mean of its divisors is an integer number (69006252).

Almost surely, 2^820808044 is an apocalyptic number.

It is an amenable number.

820808044 is an abundant number, since it is smaller than the sum of its proper divisors (835342004).

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

820808044 is a wasteful number, since it uses less digits than its factorization.

820808044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259545 (or 259543 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 820808044 is about 28649.7477126763. The cubic root of 820808044 is about 936.2975090374.

The spelling of 820808044 in words is "eight hundred twenty million, eight hundred eight thousand, forty-four".