108138012 has 12 divisors (see below), whose sum is σ = 252322056. Its totient is φ = 36046000.

The previous prime is 108138007. The next prime is 108138029. The reversal of 108138012 is 210831801.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4505739 + ... + 4505762.

It is an arithmetic number, because the mean of its divisors is an integer number (21026838).

Almost surely, 2^108138012 is an apocalyptic number.

108138012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

108138012 is an abundant number, since it is smaller than the sum of its proper divisors (144184044).

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

108138012 is a wasteful number, since it uses less digits than its factorization.

108138012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9011508 (or 9011506 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 108138012 is about 10398.9428308843. The cubic root of 108138012 is about 476.4230814609.

Adding to 108138012 its reverse (210831801), we get a palindrome (318969813).

It can be divided in two parts, 1081 and 38012, that added together give a palindrome (39093).

The spelling of 108138012 in words is "one hundred eight million, one hundred thirty-eight thousand, twelve".