1002444404 has 24 divisors (see below), whose sum is σ = 1940285928. Its totient is φ = 450161280.

The previous prime is 1002444353. The next prime is 1002444407. The reversal of 1002444404 is 4044442001.

It can be written as a sum of positive squares in 4 ways, for example, as 155052304 + 847392100 = 12452^2 + 29110^2 .

It is a super-2 number, since 2×1002444404² = 2009789566221830432, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1002444404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002444407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258587 + ... + 262434.

It is an arithmetic number, because the mean of its divisors is an integer number (80845247).

Almost surely, 2^1002444404 is an apocalyptic number.

It is an amenable number.

1002444404 is a deficient number, since it is larger than the sum of its proper divisors (937841524).

1002444404 is a wasteful number, since it uses less digits than its factorization.

1002444404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521075 (or 521073 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 23.

The square root of 1002444404 is about 31661.4024326150. The cubic root of 1002444404 is about 1000.8141383322.

Adding to 1002444404 its reverse (4044442001), we get a palindrome (5046886405).

The spelling of 1002444404 in words is "one billion, two million, four hundred forty-four thousand, four hundred four".