109197840 has 40 divisors (see below), whose sum is σ = 338514048. Its totient is φ = 29119360.

The previous prime is 109197833. The next prime is 109197911. The reversal of 109197840 is 48791901.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

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, 227256 + ... + 227735.

Almost surely, 2^109197840 is an apocalyptic number.

109197840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109197840 is an abundant number, since it is smaller than the sum of its proper divisors (229316208).

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

109197840 is a wasteful number, since it uses less digits than its factorization.

109197840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455007 (or 455001 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 109197840 is about 10449.7770311141. Note that the first 3 decimals coincide. The cubic root of 109197840 is about 477.9744505289.

The spelling of 109197840 in words is "one hundred nine million, one hundred ninety-seven thousand, eight hundred forty".