138746408 has 16 divisors (see below), whose sum is σ = 260275680. Its totient is φ = 69339568.

The previous prime is 138746407. The next prime is 138746437. The reversal of 138746408 is 804647831.

It is not an unprimeable number, because it can be changed into a prime (138746407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26591 + ... + 31377.

It is an arithmetic number, because the mean of its divisors is an integer number (16267230).

Almost surely, 2^138746408 is an apocalyptic number.

It is an amenable number.

138746408 is a deficient number, since it is larger than the sum of its proper divisors (121529272).

138746408 is a wasteful number, since it uses less digits than its factorization.

138746408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8416 (or 8412 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 138746408 is about 11779.0665164944. The cubic root of 138746408 is about 517.6949352352.

The spelling of 138746408 in words is "one hundred thirty-eight million, seven hundred forty-six thousand, four hundred eight".