1020440015 has 16 divisors (see below), whose sum is σ = 1412304960. Its totient is φ = 693308160.

The previous prime is 1020439997. The next prime is 1020440017. The reversal of 1020440015 is 5100440201.

It is not a de Polignac number, because 1020440015 - 2⁶ = 1020439951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020439975 and 1020440002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020440017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129926 + ... + 137555.

It is an arithmetic number, because the mean of its divisors is an integer number (88269060).

Almost surely, 2^1020440015 is an apocalyptic number.

1020440015 is a deficient number, since it is larger than the sum of its proper divisors (391864945).

1020440015 is a wasteful number, since it uses less digits than its factorization.

1020440015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 267602.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 1020440015 is about 31944.3268046143. The cubic root of 1020440015 is about 1006.7674368201.

Adding to 1020440015 its reverse (5100440201), we get a palindrome (6120880216).

The spelling of 1020440015 in words is "one billion, twenty million, four hundred forty thousand, fifteen".