1044004428 has 18 divisors (see below), whose sum is σ = 2639011284. Its totient is φ = 348001464.

The previous prime is 1044004427. The next prime is 1044004471. The reversal of 1044004428 is 8244004401.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1044004421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14500026 + ... + 14500097.

It is an arithmetic number, because the mean of its divisors is an integer number (146611738).

Almost surely, 2^1044004428 is an apocalyptic number.

1044004428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1044004428 is an abundant number, since it is smaller than the sum of its proper divisors (1595006856).

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

1044004428 is a wasteful number, since it uses less digits than its factorization.

1044004428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29000133 (or 29000128 counting only the distinct ones).

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

The square root of 1044004428 is about 32311.0573643142. The cubic root of 1044004428 is about 1014.4580986268.

Subtracting from 1044004428 its sum of digits (27), we obtain a palindrome (1044004401).

Adding to 1044004428 its reverse (8244004401), we get a palindrome (9288008829).

The spelling of 1044004428 in words is "one billion, forty-four million, four thousand, four hundred twenty-eight".