200431440 has 120 divisors (see below), whose sum is σ = 734336928. Its totient is φ = 48587520.

The previous prime is 200431417. The next prime is 200431447. The reversal of 200431440 is 44134002.

It is a tau number, because it is divible by the number of its divisors (120).

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 (200431447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4734 + ... + 20573.

Almost surely, 2^200431440 is an apocalyptic number.

200431440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 200431440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (367168464).

200431440 is an abundant number, since it is smaller than the sum of its proper divisors (533905488).

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

200431440 is a wasteful number, since it uses less digits than its factorization.

200431440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25337 (or 25328 counting only the distinct ones).

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

The square root of 200431440 is about 14157.3811137512. The cubic root of 200431440 is about 585.2237583654.

Adding to 200431440 its reverse (44134002), we get a palindrome (244565442).

The spelling of 200431440 in words is "two hundred million, four hundred thirty-one thousand, four hundred forty".