642338260 has 12 divisors (see below), whose sum is σ = 1348910388. Its totient is φ = 256935296.

The previous prime is 642338243. The next prime is 642338261. The reversal of 642338260 is 62833246.

It can be written as a sum of positive squares in 2 ways, for example, as 318194244 + 324144016 = 17838^2 + 18004^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642338261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16058437 + ... + 16058476.

It is an arithmetic number, because the mean of its divisors is an integer number (112409199).

Almost surely, 2^642338260 is an apocalyptic number.

It is an amenable number.

642338260 is an abundant number, since it is smaller than the sum of its proper divisors (706572128).

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

642338260 is a wasteful number, since it uses less digits than its factorization.

642338260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32116922 (or 32116920 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 34.

The square root of 642338260 is about 25344.3930682903. The cubic root of 642338260 is about 862.8221063953.

The spelling of 642338260 in words is "six hundred forty-two million, three hundred thirty-eight thousand, two hundred sixty".