138811146 has 8 divisors (see below), whose sum is σ = 277622304. Its totient is φ = 46270380.

The previous prime is 138811111. The next prime is 138811147. The reversal of 138811146 is 641118831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

138811146 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (138811147) 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, 11567590 + ... + 11567601.

It is an arithmetic number, because the mean of its divisors is an integer number (34702788).

Almost surely, 2^138811146 is an apocalyptic number.

138811146 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

138811146 is a wasteful number, since it uses less digits than its factorization.

138811146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23135196.

The product of its digits is 4608, while the sum is 33.

The square root of 138811146 is about 11781.8142066492. The cubic root of 138811146 is about 517.7754401987.

Adding to 138811146 its reverse (641118831), we get a palindrome (779929977).

The spelling of 138811146 in words is "one hundred thirty-eight million, eight hundred eleven thousand, one hundred forty-six".