109653978 has 128 divisors (see below), whose sum is σ = 286156800. Its totient is φ = 27260928.

The previous prime is 109653937. The next prime is 109653989. The reversal of 109653978 is 879356901.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 800326 + ... + 800462.

It is an arithmetic number, because the mean of its divisors is an integer number (2235600).

Almost surely, 2^109653978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109653978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143078400).

109653978 is an abundant number, since it is smaller than the sum of its proper divisors (176502822).

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

109653978 is a wasteful number, since it uses less digits than its factorization.

109653978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 109653978 is about 10471.5795370135. The cubic root of 109653978 is about 478.6390529311.

The spelling of 109653978 in words is "one hundred nine million, six hundred fifty-three thousand, nine hundred seventy-eight".