438388332 has 12 divisors (see below), whose sum is σ = 1022906136. Its totient is φ = 146129440.

The previous prime is 438388319. The next prime is 438388339. The reversal of 438388332 is 233883834.

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

It is not an unprimeable number, because it can be changed into a prime (438388339) 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, 18266169 + ... + 18266192.

It is an arithmetic number, because the mean of its divisors is an integer number (85242178).

Almost surely, 2^438388332 is an apocalyptic number.

It is an amenable number.

438388332 is an abundant number, since it is smaller than the sum of its proper divisors (584517804).

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

438388332 is a wasteful number, since it uses less digits than its factorization.

438388332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36532368 (or 36532366 counting only the distinct ones).

The product of its digits is 331776, while the sum is 42.

The square root of 438388332 is about 20937.7250913274. The cubic root of 438388332 is about 759.6607049647.

The spelling of 438388332 in words is "four hundred thirty-eight million, three hundred eighty-eight thousand, three hundred thirty-two".