2009839828 has 12 divisors (see below), whose sum is σ = 3521329812. Its totient is φ = 1003745600.

The previous prime is 2009839801. The next prime is 2009839829. The reversal of 2009839828 is 8289389002.

It can be written as a sum of positive squares in 2 ways, for example, as 1542761284 + 467078544 = 39278^2 + 21612^2 .

It is a super-2 number, since 2×2009839828² = 8078912268430139168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009839829) 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 3 ways as a sum of consecutive naturals, for example, 289723 + ... + 296578.

It is an arithmetic number, because the mean of its divisors is an integer number (293444151).

Almost surely, 2^2009839828 is an apocalyptic number.

It is an amenable number.

2009839828 is a deficient number, since it is larger than the sum of its proper divisors (1511489984).

2009839828 is a wasteful number, since it uses less digits than its factorization.

2009839828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587162 (or 587160 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 2009839828 is about 44831.2371901557. The cubic root of 2009839828 is about 1261.9839049654.

The spelling of 2009839828 in words is "two billion, nine million, eight hundred thirty-nine thousand, eight hundred twenty-eight".