642337722 has 64 divisors (see below), whose sum is σ = 1540748160. Its totient is φ = 197188992.

The previous prime is 642337699. The next prime is 642337739. The reversal of 642337722 is 227733246.

642337722 is a `hidden beast` number, since 642 + 3 + 3 + 7 + 7 + 2 + 2 = 666.

642337722 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 432393 + ... + 433875.

It is an arithmetic number, because the mean of its divisors is an integer number (24074190).

Almost surely, 2^642337722 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642337722, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (770374080).

642337722 is an abundant number, since it is smaller than the sum of its proper divisors (898410438).

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

642337722 is a wasteful number, since it uses less digits than its factorization.

642337722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2124 (or 2118 counting only the distinct ones).

The product of its digits is 84672, while the sum is 36.

The square root of 642337722 is about 25344.3824545006. The cubic root of 642337722 is about 862.8218655054.

The spelling of 642337722 in words is "six hundred forty-two million, three hundred thirty-seven thousand, seven hundred twenty-two".