1999838530 has 32 divisors (see below), whose sum is σ = 3701873664. Its totient is φ = 777289536.

The previous prime is 1999838513. The next prime is 1999838531. The reversal of 1999838530 is 358389991.

It is not an unprimeable number, because it can be changed into a prime (1999838531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316179 + ... + 322441.

It is an arithmetic number, because the mean of its divisors is an integer number (115683552).

Almost surely, 2^1999838530 is an apocalyptic number.

1999838530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1999838530 is a deficient number, since it is larger than the sum of its proper divisors (1702035134).

1999838530 is a wasteful number, since it uses less digits than its factorization.

1999838530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7170.

The product of its (nonzero) digits is 2099520, while the sum is 55.

The square root of 1999838530 is about 44719.5542240752. The cubic root of 1999838530 is about 1259.8871424070.

The spelling of 1999838530 in words is "one billion, nine hundred ninety-nine million, eight hundred thirty-eight thousand, five hundred thirty".