438453938 has 12 divisors (see below), whose sum is σ = 712163898. Its totient is φ = 202363200.

The previous prime is 438453931. The next prime is 438453941. The reversal of 438453938 is 839354834.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 284023609 + 154430329 = 16853^2 + 12427^2 .

It is a junction number, because it is equal to n+sod(n) for n = 438453892 and 438453901.

It is not an unprimeable number, because it can be changed into a prime (438453931) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 648263 + ... + 648938.

Almost surely, 2^438453938 is an apocalyptic number.

438453938 is a deficient number, since it is larger than the sum of its proper divisors (273709960).

438453938 is a wasteful number, since it uses less digits than its factorization.

438453938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1297229 (or 1297216 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 47.

The square root of 438453938 is about 20939.2917263216. The cubic root of 438453938 is about 759.6985981678.

The spelling of 438453938 in words is "four hundred thirty-eight million, four hundred fifty-three thousand, nine hundred thirty-eight".