638260134 has 8 divisors (see below), whose sum is σ = 1276520280. Its totient is φ = 212753376.

The previous prime is 638260127. The next prime is 638260153. The reversal of 638260134 is 431062836.

It is a sphenic number, since it is the product of 3 distinct primes.

638260134 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 638260095 and 638260104.

It is a congruent number.

It is an unprimeable number.

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, 53188339 + ... + 53188350.

It is an arithmetic number, because the mean of its divisors is an integer number (159565035).

Almost surely, 2^638260134 is an apocalyptic number.

638260134 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

638260134 is a wasteful number, since it uses less digits than its factorization.

638260134 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106376694.

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 638260134 is about 25263.8107576826. The cubic root of 638260134 is about 860.9922448551.

The spelling of 638260134 in words is "six hundred thirty-eight million, two hundred sixty thousand, one hundred thirty-four".