200042440 has 32 divisors (see below), whose sum is σ = 484719480. Its totient is φ = 73861632.

The previous prime is 200042419. The next prime is 200042443. The reversal of 200042440 is 44240002.

It can be written as a sum of positive squares in 4 ways, for example, as 154803364 + 45239076 = 12442^2 + 6726^2 .

It is not an unprimeable number, because it can be changed into a prime (200042443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 191829 + ... + 192868.

Almost surely, 2^200042440 is an apocalyptic number.

200042440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200042440 is an abundant number, since it is smaller than the sum of its proper divisors (284677040).

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

200042440 is a wasteful number, since it uses less digits than its factorization.

200042440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384721 (or 384717 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 200042440 is about 14143.6360247286. The cubic root of 200042440 is about 584.8449098213.

Adding to 200042440 its reverse (44240002), we get a palindrome (244282442).

The spelling of 200042440 in words is "two hundred million, forty-two thousand, four hundred forty".