138461008 has 20 divisors (see below), whose sum is σ = 306592480. Its totient is φ = 59340384.

The previous prime is 138461003. The next prime is 138461017. The reversal of 138461008 is 800164831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138461003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 618018 + ... + 618241.

It is an arithmetic number, because the mean of its divisors is an integer number (15329624).

Almost surely, 2^138461008 is an apocalyptic number.

It is an amenable number.

138461008 is an abundant number, since it is smaller than the sum of its proper divisors (168131472).

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

138461008 is a wasteful number, since it uses less digits than its factorization.

138461008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236274 (or 1236268 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 138461008 is about 11766.9455679883. The cubic root of 138461008 is about 517.3397271030.

The spelling of 138461008 in words is "one hundred thirty-eight million, four hundred sixty-one thousand, eight".