438394238 has 4 divisors (see below), whose sum is σ = 657591360. Its totient is φ = 219197118.

The previous prime is 438394211. The next prime is 438394259. The reversal of 438394238 is 832493834.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109598558 + ... + 109598561.

It is an arithmetic number, because the mean of its divisors is an integer number (164397840).

Almost surely, 2^438394238 is an apocalyptic number.

438394238 is a deficient number, since it is larger than the sum of its proper divisors (219197122).

438394238 is a wasteful number, since it uses less digits than its factorization.

438394238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219197121.

The product of its digits is 497664, while the sum is 44.

The square root of 438394238 is about 20937.8661281421. The cubic root of 438394238 is about 759.6641163511.

The spelling of 438394238 in words is "four hundred thirty-eight million, three hundred ninety-four thousand, two hundred thirty-eight".