1020440005 has 32 divisors (see below), whose sum is σ = 1353905280. Its totient is φ = 733674240.

The previous prime is 1020439997. The next prime is 1020440017. The reversal of 1020440005 is 5000440201.

It is not a de Polignac number, because 1020440005 - 2³ = 1020439997 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 477790 + ... + 479920.

It is an arithmetic number, because the mean of its divisors is an integer number (42309540).

Almost surely, 2^1020440005 is an apocalyptic number.

It is an amenable number.

1020440005 is a deficient number, since it is larger than the sum of its proper divisors (333465275).

1020440005 is a wasteful number, since it uses less digits than its factorization.

1020440005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2341.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 1020440005 is about 31944.3266480920. The cubic root of 1020440005 is about 1006.7674335314.

Adding to 1020440005 its reverse (5000440201), we get a palindrome (6020880206).

The spelling of 1020440005 in words is "one billion, twenty million, four hundred forty thousand, five".