109908638 has 16 divisors (see below), whose sum is σ = 199498464. Its totient is φ = 44332800.

The previous prime is 109908619. The next prime is 109908647. The reversal of 109908638 is 836809901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 230663 + ... + 231138.

It is an arithmetic number, because the mean of its divisors is an integer number (12468654).

Almost surely, 2^109908638 is an apocalyptic number.

109908638 is a deficient number, since it is larger than the sum of its proper divisors (89589826).

109908638 is a wasteful number, since it uses less digits than its factorization.

109908638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461827.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 109908638 is about 10483.7320644892. The cubic root of 109908638 is about 479.0092963272.

The spelling of 109908638 in words is "one hundred nine million, nine hundred eight thousand, six hundred thirty-eight".