438663768 has 16 divisors (see below), whose sum is σ = 1096659480. Its totient is φ = 146221248.

The previous prime is 438663721. The next prime is 438663781. The reversal of 438663768 is 867366834.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 438663768.

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, 9138805 + ... + 9138852.

Almost surely, 2^438663768 is an apocalyptic number.

It is an amenable number.

438663768 is an abundant number, since it is smaller than the sum of its proper divisors (657995712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

438663768 is a wasteful number, since it uses less digits than its factorization.

438663768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18277666 (or 18277662 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 51.

The square root of 438663768 is about 20944.3015639099. The cubic root of 438663768 is about 759.8197679728.

The spelling of 438663768 in words is "four hundred thirty-eight million, six hundred sixty-three thousand, seven hundred sixty-eight".