138668016 has 20 divisors (see below), whose sum is σ = 358225832. Its totient is φ = 46222656.

The previous prime is 138667961. The next prime is 138668021. The reversal of 138668016 is 610866831.

138668016 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138668016² = 38457637322752512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444411 + ... + 1444506.

Almost surely, 2^138668016 is an apocalyptic number.

138668016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

138668016 is an abundant number, since it is smaller than the sum of its proper divisors (219557816).

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

138668016 is a wasteful number, since it uses less digits than its factorization.

138668016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888928 (or 2888922 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 138668016 is about 11775.7384481823. The cubic root of 138668016 is about 517.5974173065.

The spelling of 138668016 in words is "one hundred thirty-eight million, six hundred sixty-eight thousand, sixteen".