200138660 has 12 divisors (see below), whose sum is σ = 420291228. Its totient is φ = 80055456.

The previous prime is 200138633. The next prime is 200138669. The reversal of 200138660 is 66831002.

It can be written as a sum of positive squares in 2 ways, for example, as 24364096 + 175774564 = 4936^2 + 13258^2 .

It is not an unprimeable number, because it can be changed into a prime (200138669) 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, 5003447 + ... + 5003486.

It is an arithmetic number, because the mean of its divisors is an integer number (35024269).

Almost surely, 2^200138660 is an apocalyptic number.

200138660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200138660 is an abundant number, since it is smaller than the sum of its proper divisors (220152568).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

200138660 is a wasteful number, since it uses less digits than its factorization.

200138660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006942 (or 10006940 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 200138660 is about 14147.0371456358. The cubic root of 200138660 is about 584.9386645217.

Adding to 200138660 its reverse (66831002), we get a palindrome (266969662).

The spelling of 200138660 in words is "two hundred million, one hundred thirty-eight thousand, six hundred sixty".