109438138 has 16 divisors (see below), whose sum is σ = 174744000. Its totient is φ = 51255072.

The previous prime is 109438123. The next prime is 109438151. The reversal of 109438138 is 831834901.

It is a junction number, because it is equal to n+sod(n) for n = 109438097 and 109438106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12798 + ... + 19561.

It is an arithmetic number, because the mean of its divisors is an integer number (10921500).

Almost surely, 2^109438138 is an apocalyptic number.

109438138 is a deficient number, since it is larger than the sum of its proper divisors (65305862).

109438138 is a wasteful number, since it uses less digits than its factorization.

109438138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32469.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 109438138 is about 10461.2684699323. The cubic root of 109438138 is about 478.3247998197.

The spelling of 109438138 in words is "one hundred nine million, four hundred thirty-eight thousand, one hundred thirty-eight".