642204460 has 24 divisors (see below), whose sum is σ = 1361986416. Its totient is φ = 254337600.

The previous prime is 642204421. The next prime is 642204469. The reversal of 642204460 is 64402246.

It is not an unprimeable number, because it can be changed into a prime (642204469) 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, 156942 + ... + 160981.

It is an arithmetic number, because the mean of its divisors is an integer number (56749434).

Almost surely, 2^642204460 is an apocalyptic number.

It is an amenable number.

642204460 is an abundant number, since it is smaller than the sum of its proper divisors (719781956).

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

642204460 is a wasteful number, since it uses less digits than its factorization.

642204460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318033 (or 318031 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 642204460 is about 25341.7532937246. The cubic root of 642204460 is about 862.7621931991.

The spelling of 642204460 in words is "six hundred forty-two million, two hundred four thousand, four hundred sixty".