4002423442 has 4 divisors (see below), whose sum is σ = 6003635166. Its totient is φ = 2001211720.

The previous prime is 4002423413. The next prime is 4002423443. The reversal of 4002423442 is 2443242004.

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., 3862498201 + 139925241 = 62149^2 + 11829^2 .

It is a super-2 number, since 2×4002423442² = 32038786818142254728, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (4002423443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000605859 + ... + 1000605862.

Almost surely, 2^4002423442 is an apocalyptic number.

4002423442 is a deficient number, since it is larger than the sum of its proper divisors (2001211724).

4002423442 is a wasteful number, since it uses less digits than its factorization.

4002423442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001211723.

The product of its (nonzero) digits is 6144, while the sum is 25.

The square root of 4002423442 is about 63264.7092935706. The cubic root of 4002423442 is about 1587.7215684458.

Adding to 4002423442 its reverse (2443242004), we get a palindrome (6445665446).

The spelling of 4002423442 in words is "four billion, two million, four hundred twenty-three thousand, four hundred forty-two".