438212216 has 32 divisors (see below), whose sum is σ = 886362960. Its totient is φ = 201906432.

The previous prime is 438212209. The next prime is 438212263. The reversal of 438212216 is 612212834.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63596 + ... + 70148.

Almost surely, 2^438212216 is an apocalyptic number.

It is an amenable number.

438212216 is an abundant number, since it is smaller than the sum of its proper divisors (448150744).

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

438212216 is a wasteful number, since it uses less digits than its factorization.

438212216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7215 (or 7211 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 438212216 is about 20933.5189588373. The cubic root of 438212216 is about 759.5589638715.

The spelling of 438212216 in words is "four hundred thirty-eight million, two hundred twelve thousand, two hundred sixteen".