438563456 has 16 divisors (see below), whose sum is σ = 873700890. Its totient is φ = 219281664.

The previous prime is 438563449. The next prime is 438563459. The reversal of 438563456 is 654365834.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 395214400 + 43349056 = 19880^2 + 6584^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (438563459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1713011 + ... + 1713266.

Almost surely, 2^438563456 is an apocalyptic number.

It is an amenable number.

438563456 is a deficient number, since it is larger than the sum of its proper divisors (435137434).

438563456 is an equidigital number, since it uses as much as digits as its factorization.

438563456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3426291 (or 3426279 counting only the distinct ones).

The product of its digits is 1036800, while the sum is 44.

The square root of 438563456 is about 20941.9066944727. The cubic root of 438563456 is about 759.7618459707.

The spelling of 438563456 in words is "four hundred thirty-eight million, five hundred sixty-three thousand, four hundred fifty-six".