200123940 has 48 divisors (see below), whose sum is σ = 561714048. Its totient is φ = 53236224.

The previous prime is 200123939. The next prime is 200123947. The reversal of 200123940 is 49321002.

It is a super-2 number, since 2×200123940² = 80099182722247200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (200123947) 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, 22129 + ... + 29831.

It is an arithmetic number, because the mean of its divisors is an integer number (11702376).

Almost surely, 2^200123940 is an apocalyptic number.

200123940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200123940 is an abundant number, since it is smaller than the sum of its proper divisors (361590108).

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

200123940 is a wasteful number, since it uses less digits than its factorization.

200123940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8148 (or 8146 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 200123940 is about 14146.5168857921. The cubic root of 200123940 is about 584.9243236172.

Adding to 200123940 its reverse (49321002), we get a palindrome (249444942).

The spelling of 200123940 in words is "two hundred million, one hundred twenty-three thousand, nine hundred forty".