638011060 has 12 divisors (see below), whose sum is σ = 1339823268. Its totient is φ = 255204416.

The previous prime is 638010949. The next prime is 638011061. The reversal of 638011060 is 60110836.

It can be written as a sum of positive squares in 2 ways, for example, as 440496144 + 197514916 = 20988^2 + 14054^2 .

It is a super-2 number, since 2×638011060² = 814116225364647200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (638011061) 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 3 ways as a sum of consecutive naturals, for example, 15950257 + ... + 15950296.

It is an arithmetic number, because the mean of its divisors is an integer number (111651939).

Almost surely, 2^638011060 is an apocalyptic number.

It is an amenable number.

638011060 is an abundant number, since it is smaller than the sum of its proper divisors (701812208).

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

638011060 is a wasteful number, since it uses less digits than its factorization.

638011060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31900562 (or 31900560 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 638011060 is about 25258.8808144779. The cubic root of 638011060 is about 860.8802326975.

Adding to 638011060 its reverse (60110836), we get a palindrome (698121896).

The spelling of 638011060 in words is "six hundred thirty-eight million, eleven thousand, sixty".