1005044440 has 16 divisors (see below), whose sum is σ = 2261350080. Its totient is φ = 402017760.

The previous prime is 1005044429. The next prime is 1005044519. The reversal of 1005044440 is 444405001.

It is a super-2 number, since 2×1005044440² = 2020228652749827200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12563016 + ... + 12563095.

It is an arithmetic number, because the mean of its divisors is an integer number (141334380).

Almost surely, 2^1005044440 is an apocalyptic number.

1005044440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1005044440 is an abundant number, since it is smaller than the sum of its proper divisors (1256305640).

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

1005044440 is a wasteful number, since it uses less digits than its factorization.

1005044440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25126122 (or 25126118 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 1005044440 is about 31702.4358685575. The cubic root of 1005044440 is about 1001.6786605221.

Adding to 1005044440 its reverse (444405001), we get a palindrome (1449449441).

The spelling of 1005044440 in words is "one billion, five million, forty-four thousand, four hundred forty".