438220632 has 16 divisors (see below), whose sum is σ = 1095551640. Its totient is φ = 146073536.

The previous prime is 438220609. The next prime is 438220691. The reversal of 438220632 is 236022834.

It is a self number, because there is not a number n which added to its sum of digits gives 438220632.

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, 9129573 + ... + 9129620.

Almost surely, 2^438220632 is an apocalyptic number.

It is an amenable number.

438220632 is an abundant number, since it is smaller than the sum of its proper divisors (657331008).

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

438220632 is a wasteful number, since it uses less digits than its factorization.

438220632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18259202 (or 18259198 counting only the distinct ones).

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

The square root of 438220632 is about 20933.7199751979. The cubic root of 438220632 is about 759.5638263613.

The spelling of 438220632 in words is "four hundred thirty-eight million, two hundred twenty thousand, six hundred thirty-two".