438991422 has 8 divisors (see below), whose sum is σ = 877982856. Its totient is φ = 146330472.

The previous prime is 438991417. The next prime is 438991433. The reversal of 438991422 is 224199834.

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

438991422 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36582613 + ... + 36582624.

It is an arithmetic number, because the mean of its divisors is an integer number (109747857).

Almost surely, 2^438991422 is an apocalyptic number.

438991422 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.

438991422 is a wasteful number, since it uses less digits than its factorization.

438991422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73165242.

The product of its digits is 124416, while the sum is 42.

The square root of 438991422 is about 20952.1221359556. The cubic root of 438991422 is about 760.0088999419.

The spelling of 438991422 in words is "four hundred thirty-eight million, nine hundred ninety-one thousand, four hundred twenty-two".