109905378 has 16 divisors (see below), whose sum is σ = 239793696. Its totient is φ = 33304640.

The previous prime is 109905361. The next prime is 109905403. The reversal of 109905378 is 873509901.

It is a happy number.

It is a super-2 number, since 2×109905378² = 24158384226645768, which contains 22 as substring.

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, 832551 + ... + 832682.

It is an arithmetic number, because the mean of its divisors is an integer number (14987106).

Almost surely, 2^109905378 is an apocalyptic number.

109905378 is an abundant number, since it is smaller than the sum of its proper divisors (129888318).

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

109905378 is a wasteful number, since it uses less digits than its factorization.

109905378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1665249.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 109905378 is about 10483.5765843533. The cubic root of 109905378 is about 479.0045603156.

The spelling of 109905378 in words is "one hundred nine million, nine hundred five thousand, three hundred seventy-eight".