200420644 has 6 divisors (see below), whose sum is σ = 350736134. Its totient is φ = 100210320.

The previous prime is 200420641. The next prime is 200420659. The reversal of 200420644 is 446024002.

200420644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 170302500 + 30118144 = 13050^2 + 5488^2 .

It is not an unprimeable number, because it can be changed into a prime (200420641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25052577 + ... + 25052584.

Almost surely, 2^200420644 is an apocalyptic number.

It is an amenable number.

200420644 is a deficient number, since it is larger than the sum of its proper divisors (150315490).

200420644 is a wasteful number, since it uses less digits than its factorization.

200420644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50105165 (or 50105163 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 200420644 is about 14156.9998234089. Note that the first 3 decimals coincide. The cubic root of 200420644 is about 585.2132507173.

Adding to 200420644 its reverse (446024002), we get a palindrome (646444646).

The spelling of 200420644 in words is "two hundred million, four hundred twenty thousand, six hundred forty-four".