63905238 has 24 divisors (see below), whose sum is σ = 138718008. Its totient is φ = 21262272.

The previous prime is 63905221. The next prime is 63905239. The reversal of 63905238 is 83250936.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63905239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7681 + ... + 13667.

It is an arithmetic number, because the mean of its divisors is an integer number (5779917).

Almost surely, 2^63905238 is an apocalyptic number.

63905238 is an abundant number, since it is smaller than the sum of its proper divisors (74812770).

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

63905238 is a wasteful number, since it uses less digits than its factorization.

63905238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6588 (or 6585 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 63905238 is about 7994.0751810325. The cubic root of 63905238 is about 399.8024816490.

It can be divided in two parts, 6390 and 5238, that added together give a triangular number (11628 = T₁₅₂).

The spelling of 63905238 in words is "sixty-three million, nine hundred five thousand, two hundred thirty-eight".