138608366 has 16 divisors (see below), whose sum is σ = 224244384. Its totient is φ = 63876384.

The previous prime is 138608341. The next prime is 138608377. The reversal of 138608366 is 663806831.

138608366 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 15236 + ... + 22568.

It is an arithmetic number, because the mean of its divisors is an integer number (14015274).

Almost surely, 2^138608366 is an apocalyptic number.

138608366 is a deficient number, since it is larger than the sum of its proper divisors (85636018).

138608366 is a wasteful number, since it uses less digits than its factorization.

138608366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8075.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 138608366 is about 11773.2054258813. The cubic root of 138608366 is about 517.5231893893.

The spelling of 138608366 in words is "one hundred thirty-eight million, six hundred eight thousand, three hundred sixty-six".