438568638 has 8 divisors (see below), whose sum is σ = 877137288. Its totient is φ = 146189544.

The previous prime is 438568631. The next prime is 438568639. The reversal of 438568638 is 836865834.

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

438568638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438568631) 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, 36547381 + ... + 36547392.

It is an arithmetic number, because the mean of its divisors is an integer number (109642161).

Almost surely, 2^438568638 is an apocalyptic number.

438568638 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.

438568638 is a wasteful number, since it uses less digits than its factorization.

438568638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73094778.

The product of its digits is 3317760, while the sum is 51.

The square root of 438568638 is about 20942.0304173210. The cubic root of 438568638 is about 759.7648383695.

The spelling of 438568638 in words is "four hundred thirty-eight million, five hundred sixty-eight thousand, six hundred thirty-eight".