200031444 has 120 divisors (see below), whose sum is σ = 551397000. Its totient is φ = 63141120.

The previous prime is 200031443. The next prime is 200031451. The reversal of 200031444 is 444130002.

It can be written as a sum of positive squares in 4 ways, for example, as 9922500 + 190108944 = 3150^2 + 13788^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200031443) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 572982 + ... + 573330.

It is an arithmetic number, because the mean of its divisors is an integer number (4594975).

Almost surely, 2^200031444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200031444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275698500).

200031444 is an abundant number, since it is smaller than the sum of its proper divisors (351365556).

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

200031444 is a wasteful number, since it uses less digits than its factorization.

200031444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 455 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 200031444 is about 14143.2472933199. The cubic root of 200031444 is about 584.8341936412.

Adding to 200031444 its reverse (444130002), we get a palindrome (644161446).

The spelling of 200031444 in words is "two hundred million, thirty-one thousand, four hundred forty-four".