638112306 has 32 divisors (see below), whose sum is σ = 1455245568. Its totient is φ = 184792320.

The previous prime is 638112301. The next prime is 638112311. The reversal of 638112306 is 603211836.

It is an interprime number because it is at equal distance from previous prime (638112301) and next prime (638112311).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (638112301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239290 + ... + 241941.

It is an arithmetic number, because the mean of its divisors is an integer number (45476424).

Almost surely, 2^638112306 is an apocalyptic number.

638112306 is an abundant number, since it is smaller than the sum of its proper divisors (817133262).

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

638112306 is a wasteful number, since it uses less digits than its factorization.

638112306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481266.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 638112306 is about 25260.8849013648. The cubic root of 638112306 is about 860.9257679948.

The spelling of 638112306 in words is "six hundred thirty-eight million, one hundred twelve thousand, three hundred six".