138430668 has 24 divisors (see below), whose sum is σ = 325066672. Its totient is φ = 45849024.

The previous prime is 138430639. The next prime is 138430681. The reversal of 138430668 is 866034831.

It is a plaindrome in base 14.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34855 + ... + 38622.

Almost surely, 2^138430668 is an apocalyptic number.

It is an amenable number.

138430668 is an abundant number, since it is smaller than the sum of its proper divisors (186636004).

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

138430668 is a wasteful number, since it uses less digits than its factorization.

138430668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73641 (or 73639 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 138430668 is about 11765.6562927871. The cubic root of 138430668 is about 517.3019373210.

The spelling of 138430668 in words is "one hundred thirty-eight million, four hundred thirty thousand, six hundred sixty-eight".