438129428 has 12 divisors (see below), whose sum is σ = 836428992. Its totient is φ = 199149720.

The previous prime is 438129421. The next prime is 438129437. The reversal of 438129428 is 824921834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438129421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4978700 + ... + 4978787.

It is an arithmetic number, because the mean of its divisors is an integer number (69702416).

Almost surely, 2^438129428 is an apocalyptic number.

It is an amenable number.

438129428 is a deficient number, since it is larger than the sum of its proper divisors (398299564).

438129428 is a wasteful number, since it uses less digits than its factorization.

438129428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957502 (or 9957500 counting only the distinct ones).

The product of its digits is 110592, while the sum is 41.

The square root of 438129428 is about 20931.5414625870. The cubic root of 438129428 is about 759.5111283513.

The spelling of 438129428 in words is "four hundred thirty-eight million, one hundred twenty-nine thousand, four hundred twenty-eight".