442121894 has 4 divisors (see below), whose sum is σ = 663182844. Its totient is φ = 221060946.

The previous prime is 442121881. The next prime is 442121909. The reversal of 442121894 is 498121244.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110530472 + ... + 110530475.

It is an arithmetic number, because the mean of its divisors is an integer number (165795711).

Almost surely, 2^442121894 is an apocalyptic number.

442121894 is a deficient number, since it is larger than the sum of its proper divisors (221060950).

442121894 is a wasteful number, since it uses less digits than its factorization.

442121894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221060949.

The product of its digits is 18432, while the sum is 35.

The square root of 442121894 is about 21026.6947949505. The cubic root of 442121894 is about 761.8111777624.

The spelling of 442121894 in words is "four hundred forty-two million, one hundred twenty-one thousand, eight hundred ninety-four".