1040020209 has 32 divisors (see below), whose sum is σ = 1593338880. Its totient is φ = 669772800.

The previous prime is 1040020181. The next prime is 1040020213. The reversal of 1040020209 is 9020200401.

It is not a de Polignac number, because 1040020209 - 2⁹ = 1040019697 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1040020191 and 1040020200.

It is not an unprimeable number, because it can be changed into a prime (1040020109) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 853969 + ... + 855185.

It is an arithmetic number, because the mean of its divisors is an integer number (49791840).

Almost surely, 2^1040020209 is an apocalyptic number.

It is an amenable number.

1040020209 is a deficient number, since it is larger than the sum of its proper divisors (553318671).

1040020209 is a wasteful number, since it uses less digits than its factorization.

1040020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2278 (or 2272 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1040020209 is about 32249.3443189160. The cubic root of 1040020209 is about 1013.1659662579.

The spelling of 1040020209 in words is "one billion, forty million, twenty thousand, two hundred nine".