638489058 has 8 divisors (see below), whose sum is σ = 1276978128. Its totient is φ = 212829684.

The previous prime is 638489041. The next prime is 638489087. The reversal of 638489058 is 850984836.

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

638489058 is an admirable number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 638489058.

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, 53207416 + ... + 53207427.

It is an arithmetic number, because the mean of its divisors is an integer number (159622266).

Almost surely, 2^638489058 is an apocalyptic number.

638489058 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.

638489058 is a wasteful number, since it uses less digits than its factorization.

638489058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106414848.

The product of its (nonzero) digits is 1658880, while the sum is 51.

The square root of 638489058 is about 25268.3410219191. The cubic root of 638489058 is about 861.0951695708.

The spelling of 638489058 in words is "six hundred thirty-eight million, four hundred eighty-nine thousand, fifty-eight".