438815466 has 12 divisors (see below), whose sum is σ = 950766882. Its totient is φ = 146271816.

The previous prime is 438815423. The next prime is 438815467. The reversal of 438815466 is 664518834.

438815466 is a `hidden beast` number, since 438 + 8 + 154 + 66 = 666.

It can be written as a sum of positive squares in only one way, i.e., 429359841 + 9455625 = 20721^2 + 3075^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (438815467) 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, 12189301 + ... + 12189336.

Almost surely, 2^438815466 is an apocalyptic number.

438815466 is an abundant number, since it is smaller than the sum of its proper divisors (511951416).

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

438815466 is a wasteful number, since it uses less digits than its factorization.

438815466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24378645 (or 24378642 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 438815466 is about 20947.9227132430. The cubic root of 438815466 is about 759.9073444292.

The spelling of 438815466 in words is "four hundred thirty-eight million, eight hundred fifteen thousand, four hundred sixty-six".