442053646 has 4 divisors (see below), whose sum is σ = 663080472. Its totient is φ = 221026822.

The previous prime is 442053643. The next prime is 442053691. The reversal of 442053646 is 646350244.

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

It is a super-2 number, since 2×442053646² = 390822851883786632, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442053643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110513410 + ... + 110513413.

It is an arithmetic number, because the mean of its divisors is an integer number (165770118).

Almost surely, 2^442053646 is an apocalyptic number.

442053646 is a deficient number, since it is larger than the sum of its proper divisors (221026826).

442053646 is a wasteful number, since it uses less digits than its factorization.

442053646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221026825.

The product of its (nonzero) digits is 69120, while the sum is 34.

The square root of 442053646 is about 21025.0718429213. The cubic root of 442053646 is about 761.7719768351.

The spelling of 442053646 in words is "four hundred forty-two million, fifty-three thousand, six hundred forty-six".