442540144 has 20 divisors (see below), whose sum is σ = 858163824. Its totient is φ = 221078528.

The previous prime is 442540117. The next prime is 442540151. The reversal of 442540144 is 441045244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8109 + ... + 30835.

Almost surely, 2^442540144 is an apocalyptic number.

It is an amenable number.

442540144 is a deficient number, since it is larger than the sum of its proper divisors (415623680).

442540144 is a wasteful number, since it uses less digits than its factorization.

442540144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23952 (or 23946 counting only the distinct ones).

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

The square root of 442540144 is about 21036.6381344548. The cubic root of 442540144 is about 762.0513280526.

Adding to 442540144 its reverse (441045244), we get a palindrome (883585388).

The spelling of 442540144 in words is "four hundred forty-two million, five hundred forty thousand, one hundred forty-four".