1000440402 has 128 divisors (see below), whose sum is σ = 2368880640. Its totient is φ = 279002880.

The previous prime is 1000440391. The next prime is 1000440439. The reversal of 1000440402 is 2040440001.

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 63 ways as a sum of consecutive naturals, for example, 3691527 + ... + 3691797.

It is an arithmetic number, because the mean of its divisors is an integer number (18506880).

Almost surely, 2^1000440402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1000440402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184440320).

1000440402 is an abundant number, since it is smaller than the sum of its proper divisors (1368440238).

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

1000440402 is a wasteful number, since it uses less digits than its factorization.

1000440402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 1000440402 is about 31629.7392022128. The cubic root of 1000440402 is about 1000.1467791215.

Adding to 1000440402 its reverse (2040440001), we get a palindrome (3040880403).

The spelling of 1000440402 in words is "one billion, four hundred forty thousand, four hundred two".