1044404820 has 192 divisors, whose sum is σ = 3329679360. Its totient is φ = 271724544.

The previous prime is 1044404797. The next prime is 1044404821. The reversal of 1044404820 is 284044401.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044404821) 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 63 ways as a sum of consecutive naturals, for example, 6652182 + ... + 6652338.

It is an arithmetic number, because the mean of its divisors is an integer number (17342080).

Almost surely, 2^1044404820 is an apocalyptic number.

1044404820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1044404820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664839680).

1044404820 is an abundant number, since it is smaller than the sum of its proper divisors (2285274540).

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

1044404820 is a wasteful number, since it uses less digits than its factorization.

1044404820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 1044404820 is about 32317.2526678862. The cubic root of 1044404820 is about 1014.5877688918.

The spelling of 1044404820 in words is "one billion, forty-four million, four hundred four thousand, eight hundred twenty".