442621352 has 8 divisors (see below), whose sum is σ = 829915050. Its totient is φ = 221310672.

The previous prime is 442621351. The next prime is 442621357. The reversal of 442621352 is 253126244.

It can be written as a sum of positive squares in only one way, i.e., 431559076 + 11062276 = 20774^2 + 3326^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×442621352² = 391827322492615808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442621351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27663827 + ... + 27663842.

Almost surely, 2^442621352 is an apocalyptic number.

It is an amenable number.

442621352 is a deficient number, since it is larger than the sum of its proper divisors (387293698).

442621352 is a wasteful number, since it uses less digits than its factorization.

442621352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55327675 (or 55327671 counting only the distinct ones).

The product of its digits is 11520, while the sum is 29.

The square root of 442621352 is about 21038.5682022328. The cubic root of 442621352 is about 762.0979384223.

Adding to 442621352 its reverse (253126244), we get a palindrome (695747596).

The spelling of 442621352 in words is "four hundred forty-two million, six hundred twenty-one thousand, three hundred fifty-two".