109797408 has 144 divisors (see below), whose sum is σ = 360884160. Its totient is φ = 31016448.

The previous prime is 109797383. The next prime is 109797421. The reversal of 109797408 is 804797901.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 215458 + ... + 215966.

It is an arithmetic number, because the mean of its divisors is an integer number (2506140).

Almost surely, 2^109797408 is an apocalyptic number.

109797408 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109797408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (180442080).

109797408 is an abundant number, since it is smaller than the sum of its proper divisors (251086752).

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

109797408 is a wasteful number, since it uses less digits than its factorization.

109797408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 628 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 109797408 is about 10478.4258359736. The cubic root of 109797408 is about 478.8476524118.

The spelling of 109797408 in words is "one hundred nine million, seven hundred ninety-seven thousand, four hundred eight".