642463752 has 32 divisors (see below), whose sum is σ = 1835611200. Its totient is φ = 183561024.

The previous prime is 642463751. The next prime is 642463793. The reversal of 642463752 is 257364246.

It is a self number, because there is not a number n which added to its sum of digits gives 642463752.

It is not an unprimeable number, because it can be changed into a prime (642463751) 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, 1911927 + ... + 1912262.

It is an arithmetic number, because the mean of its divisors is an integer number (57362850).

Almost surely, 2^642463752 is an apocalyptic number.

It is an amenable number.

642463752 is an abundant number, since it is smaller than the sum of its proper divisors (1193147448).

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

642463752 is a wasteful number, since it uses less digits than its factorization.

642463752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3824205 (or 3824201 counting only the distinct ones).

The product of its digits is 241920, while the sum is 39.

The square root of 642463752 is about 25346.8686823442. The cubic root of 642463752 is about 862.8782918602.

The spelling of 642463752 in words is "six hundred forty-two million, four hundred sixty-three thousand, seven hundred fifty-two".