438728422 has 16 divisors (see below), whose sum is σ = 720788544. Its totient is φ = 198625000.

The previous prime is 438728419. The next prime is 438728429. The reversal of 438728422 is 224827834.

It is a happy number.

It is a super-2 number, since 2×438728422² = 384965256541220168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438728429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34204 + ... + 45247.

It is an arithmetic number, because the mean of its divisors is an integer number (45049284).

Almost surely, 2^438728422 is an apocalyptic number.

438728422 is a deficient number, since it is larger than the sum of its proper divisors (282060122).

438728422 is a wasteful number, since it uses less digits than its factorization.

438728422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79715.

The product of its digits is 172032, while the sum is 40.

The square root of 438728422 is about 20945.8449817619. The cubic root of 438728422 is about 759.8570957073.

The spelling of 438728422 in words is "four hundred thirty-eight million, seven hundred twenty-eight thousand, four hundred twenty-two".