642443352 has 32 divisors (see below), whose sum is σ = 1690641600. Its totient is φ = 202876704.

The previous prime is 642443341. The next prime is 642443353. The reversal of 642443352 is 253344246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642443353) 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 in 7 ways as a sum of consecutive naturals, for example, 703978 + ... + 704889.

It is an arithmetic number, because the mean of its divisors is an integer number (52832550).

Almost surely, 2^642443352 is an apocalyptic number.

It is an amenable number.

642443352 is an abundant number, since it is smaller than the sum of its proper divisors (1048198248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

642443352 is a wasteful number, since it uses less digits than its factorization.

642443352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408895 (or 1408891 counting only the distinct ones).

The product of its digits is 69120, while the sum is 33.

The square root of 642443352 is about 25346.4662625779. The cubic root of 642443352 is about 862.8691588399.

Adding to 642443352 its reverse (253344246), we get a palindrome (895787598).

The spelling of 642443352 in words is "six hundred forty-two million, four hundred forty-three thousand, three hundred fifty-two".