200440242 has 54 divisors (see below), whose sum is σ = 450061599. Its totient is φ = 64470840.

The previous prime is 200440237. The next prime is 200440259. The reversal of 200440242 is 242044002.

200440242 is a `hidden beast` number, since 200 + 440 + 24 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 100220121 + 100220121 = 10011^2 + 10011^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=10011.

It is a super-2 number, since 2×200440242² = 80352581226037128, which contains 22 as substring.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2823067 + ... + 2823137.

Almost surely, 2^200440242 is an apocalyptic number.

200440242 is an abundant number, since it is smaller than the sum of its proper divisors (249621357).

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

200440242 is an equidigital number, since it uses as much as digits as its factorization.

200440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244 (or 123 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 200440242 is about 14157.6919729171. The cubic root of 200440242 is about 585.2323249923.

Multiplying 200440242 by its sum of digits (18), we get a square (3607924356 = 60066²).

200440242 divided by its sum of digits (18) gives a square (11135569 = 3337²).

Multiplying 200440242 by its product of nonzero digits (512), we get a square (102625403904 = 320352²).

Adding to 200440242 its reverse (242044002), we get a palindrome (442484244).

The spelling of 200440242 in words is "two hundred million, four hundred forty thousand, two hundred forty-two".