138612608 has 16 divisors (see below), whose sum is σ = 276142560. Its totient is φ = 69306240.

The previous prime is 138612599. The next prime is 138612613. The reversal of 138612608 is 806216831.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541328 + ... + 541583.

It is an arithmetic number, because the mean of its divisors is an integer number (17258910).

Almost surely, 2^138612608 is an apocalyptic number.

It is an amenable number.

138612608 is a deficient number, since it is larger than the sum of its proper divisors (137529952).

138612608 is an equidigital number, since it uses as much as digits as its factorization.

138612608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082925 (or 1082913 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 138612608 is about 11773.3855793480. The cubic root of 138612608 is about 517.5284687988.

The spelling of 138612608 in words is "one hundred thirty-eight million, six hundred twelve thousand, six hundred eight".