420033442 has 4 divisors (see below), whose sum is σ = 630050166. Its totient is φ = 210016720.

The previous prime is 420033401. The next prime is 420033443. The reversal of 420033442 is 244330024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 413268241 + 6765201 = 20329^2 + 2601^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (420033443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105008359 + ... + 105008362.

Almost surely, 2^420033442 is an apocalyptic number.

420033442 is a deficient number, since it is larger than the sum of its proper divisors (210016724).

420033442 is a wasteful number, since it uses less digits than its factorization.

420033442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210016723.

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 420033442 is about 20494.7174169345. The cubic root of 420033442 is about 748.9071146126.

Adding to 420033442 its reverse (244330024), we get a palindrome (664363466).

The spelling of 420033442 in words is "four hundred twenty million, thirty-three thousand, four hundred forty-two".