438129684 has 36 divisors (see below), whose sum is σ = 1112762560. Its totient is φ = 145348560.

The previous prime is 438129667. The next prime is 438129689. The reversal of 438129684 is 486921834.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438129689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21244 + ... + 36435.

Almost surely, 2^438129684 is an apocalyptic number.

It is an amenable number.

438129684 is an abundant number, since it is smaller than the sum of its proper divisors (674632876).

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

438129684 is a wasteful number, since it uses less digits than its factorization.

438129684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57900 (or 57895 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 438129684 is about 20931.5475777593. The cubic root of 438129684 is about 759.5112762793.

The spelling of 438129684 in words is "four hundred thirty-eight million, one hundred twenty-nine thousand, six hundred eighty-four".