1004544420 has 144 divisors (see below), whose sum is σ = 3112966080. Its totient is φ = 241852160.

The previous prime is 1004544407. The next prime is 1004544451. The reversal of 1004544420 is 244454001.

It is a happy 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 47 ways as a sum of consecutive naturals, for example, 1299154 + ... + 1299926.

It is an arithmetic number, because the mean of its divisors is an integer number (21617820).

Almost surely, 2^1004544420 is an apocalyptic number.

1004544420 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 1004544420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1556483040).

1004544420 is an abundant number, since it is smaller than the sum of its proper divisors (2108421660).

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

1004544420 is a wasteful number, since it uses less digits than its factorization.

1004544420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 973 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 1004544420 is about 31694.5487426466. The cubic root of 1004544420 is about 1001.5125178032.

Adding to 1004544420 its reverse (244454001), we get a palindrome (1248998421).

The spelling of 1004544420 in words is "one billion, four million, five hundred forty-four thousand, four hundred twenty".