1002444040 has 64 divisors (see below), whose sum is σ = 2434062960. Its totient is φ = 369361920.

The previous prime is 1002444019. The next prime is 1002444061. The reversal of 1002444040 is 404442001.

It is an interprime number because it is at equal distance from previous prime (1002444019) and next prime (1002444061).

It can be written as a sum of positive squares in 8 ways, for example, as 13089924 + 989354116 = 3618^2 + 31454^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1002443999 and 1002444017.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 287910 + ... + 291370.

Almost surely, 2^1002444040 is an apocalyptic number.

1002444040 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 1002444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1217031480).

1002444040 is an abundant number, since it is smaller than the sum of its proper divisors (1431618920).

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

1002444040 is a wasteful number, since it uses less digits than its factorization.

1002444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042 (or 4038 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 1002444040 is about 31661.3966842905. The cubic root of 1002444040 is about 1000.8140171962.

Adding to 1002444040 its reverse (404442001), we get a palindrome (1406886041).

The spelling of 1002444040 in words is "one billion, two million, four hundred forty-four thousand, forty".