642602228 has 6 divisors (see below), whose sum is σ = 1124553906. Its totient is φ = 321301112.

The previous prime is 642602201. The next prime is 642602237. The reversal of 642602228 is 822206246.

642602228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 411197284 + 231404944 = 20278^2 + 15212^2 .

It is a junction number, because it is equal to n+sod(n) for n = 642602194 and 642602203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80325275 + ... + 80325282.

It is an arithmetic number, because the mean of its divisors is an integer number (187425651).

Almost surely, 2^642602228 is an apocalyptic number.

It is an amenable number.

642602228 is a deficient number, since it is larger than the sum of its proper divisors (481951678).

642602228 is a wasteful number, since it uses less digits than its factorization.

642602228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160650561 (or 160650559 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 642602228 is about 25349.6001546375. The cubic root of 642602228 is about 862.9402820504.

The spelling of 642602228 in words is "six hundred forty-two million, six hundred two thousand, two hundred twenty-eight".