442542938 has 4 divisors (see below), whose sum is σ = 663814410. Its totient is φ = 221271468.

The previous prime is 442542937. The next prime is 442542941. The reversal of 442542938 is 839245244.

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., 432764809 + 9778129 = 20803^2 + 3127^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442542895 and 442542904.

It is not an unprimeable number, because it can be changed into a prime (442542937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110635733 + ... + 110635736.

Almost surely, 2^442542938 is an apocalyptic number.

442542938 is a deficient number, since it is larger than the sum of its proper divisors (221271472).

442542938 is a wasteful number, since it uses less digits than its factorization.

442542938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221271471.

The product of its digits is 276480, while the sum is 41.

The square root of 442542938 is about 21036.7045422994. The cubic root of 442542938 is about 762.0529317993.

The spelling of 442542938 in words is "four hundred forty-two million, five hundred forty-two thousand, nine hundred thirty-eight".