642552344 has 32 divisors (see below), whose sum is σ = 1378840320. Its totient is φ = 274991136.

The previous prime is 642552341. The next prime is 642552367. The reversal of 642552344 is 443255246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642552341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 33887 + ... + 49329.

It is an arithmetic number, because the mean of its divisors is an integer number (43088760).

Almost surely, 2^642552344 is an apocalyptic number.

It is an amenable number.

642552344 is an abundant number, since it is smaller than the sum of its proper divisors (736287976).

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

642552344 is a wasteful number, since it uses less digits than its factorization.

642552344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16199 (or 16195 counting only the distinct ones).

The product of its digits is 115200, while the sum is 35.

The square root of 642552344 is about 25348.6162146970. The cubic root of 642552344 is about 862.9179519966.

The spelling of 642552344 in words is "six hundred forty-two million, five hundred fifty-two thousand, three hundred forty-four".