1650028109 has 8 divisors (see below), whose sum is σ = 1807333560. Its totient is φ = 1499416576.

The previous prime is 1650028097. The next prime is 1650028123. The reversal of 1650028109 is 9018200561.

It can be written as a sum of positive squares in 4 ways, for example, as 1021122025 + 628906084 = 31955^2 + 25078^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1650028109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1650028129) 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, 1672964 + ... + 1673949.

It is an arithmetic number, because the mean of its divisors is an integer number (225916695).

Almost surely, 2^1650028109 is an apocalyptic number.

It is an amenable number.

1650028109 is a deficient number, since it is larger than the sum of its proper divisors (157305451).

1650028109 is a wasteful number, since it uses less digits than its factorization.

1650028109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3346959.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 1650028109 is about 40620.5380195782. The cubic root of 1650028109 is about 1181.6724606198.

The spelling of 1650028109 in words is "one billion, six hundred fifty million, twenty-eight thousand, one hundred nine".