438388828 has 12 divisors (see below), whose sum is σ = 771076152. Its totient is φ = 218081360.

The previous prime is 438388817. The next prime is 438388831. The reversal of 438388828 is 828883834.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277378 + ... + 278953.

It is an arithmetic number, because the mean of its divisors is an integer number (64256346).

Almost surely, 2^438388828 is an apocalyptic number.

It is an amenable number.

438388828 is a deficient number, since it is larger than the sum of its proper divisors (332687324).

438388828 is a wasteful number, since it uses less digits than its factorization.

438388828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556532 (or 556530 counting only the distinct ones).

The product of its digits is 2359296, while the sum is 52.

The square root of 438388828 is about 20937.7369359728. The cubic root of 438388828 is about 759.6609914623.

The spelling of 438388828 in words is "four hundred thirty-eight million, three hundred eighty-eight thousand, eight hundred twenty-eight".