442123330 has 32 divisors (see below), whose sum is σ = 870144768. Its totient is φ = 160406400.

The previous prime is 442123307. The next prime is 442123343. The reversal of 442123330 is 33321244.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46590 + ... + 55270.

It is an arithmetic number, because the mean of its divisors is an integer number (27192024).

Almost surely, 2^442123330 is an apocalyptic number.

442123330 is a deficient number, since it is larger than the sum of its proper divisors (428021438).

442123330 is a wasteful number, since it uses less digits than its factorization.

442123330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9162.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 442123330 is about 21026.7289419919. The cubic root of 442123330 is about 761.8120025423.

Adding to 442123330 its reverse (33321244), we get a palindrome (475444574).

The spelling of 442123330 in words is "four hundred forty-two million, one hundred twenty-three thousand, three hundred thirty".