438022236 has 12 divisors (see below), whose sum is σ = 1022051912. Its totient is φ = 146007408.

The previous prime is 438022223. The next prime is 438022237. The reversal of 438022236 is 632220834.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438022237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18250915 + ... + 18250938.

Almost surely, 2^438022236 is an apocalyptic number.

It is an amenable number.

438022236 is an abundant number, since it is smaller than the sum of its proper divisors (584029676).

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

438022236 is a wasteful number, since it uses less digits than its factorization.

438022236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36501860 (or 36501858 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 438022236 is about 20928.9807683031. The cubic root of 438022236 is about 759.4491830660.

The spelling of 438022236 in words is "four hundred thirty-eight million, twenty-two thousand, two hundred thirty-six".