438689688 has 32 divisors (see below), whose sum is σ = 1112175360. Its totient is φ = 144169760.

The previous prime is 438689687. The next prime is 438689701. The reversal of 438689688 is 886986834.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438689687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127020 + ... + 130427.

It is an arithmetic number, because the mean of its divisors is an integer number (34755480).

Almost surely, 2^438689688 is an apocalyptic number.

It is an amenable number.

438689688 is an abundant number, since it is smaller than the sum of its proper divisors (673485672).

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

438689688 is a wasteful number, since it uses less digits than its factorization.

438689688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257527 (or 257523 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 60.

The square root of 438689688 is about 20944.9203388316. The cubic root of 438689688 is about 759.8347332240.

The spelling of 438689688 in words is "four hundred thirty-eight million, six hundred eighty-nine thousand, six hundred eighty-eight".