4001444542 has 4 divisors (see below), whose sum is σ = 6002166816. Its totient is φ = 2000722270.

The previous prime is 4001444537. The next prime is 4001444597. The reversal of 4001444542 is 2454441004.

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

It is a self number, because there is not a number n which added to its sum of digits gives 4001444542.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 1000361134 + ... + 1000361137.

It is an arithmetic number, because the mean of its divisors is an integer number (1500541704).

Almost surely, 2^4001444542 is an apocalyptic number.

4001444542 is a deficient number, since it is larger than the sum of its proper divisors (2000722274).

4001444542 is a wasteful number, since it uses less digits than its factorization.

4001444542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000722273.

The product of its (nonzero) digits is 10240, while the sum is 28.

The square root of 4001444542 is about 63256.9722797416. The cubic root of 4001444542 is about 1587.5921179273.

Adding to 4001444542 its reverse (2454441004), we get a palindrome (6455885546).

The spelling of 4001444542 in words is "four billion, one million, four hundred forty-four thousand, five hundred forty-two".