109781408 has 48 divisors (see below), whose sum is σ = 241297056. Its totient is φ = 48733440.

The previous prime is 109781389. The next prime is 109781423. The reversal of 109781408 is 804187901.

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, 11510 + ... + 18762.

It is an arithmetic number, because the mean of its divisors is an integer number (5027022).

Almost surely, 2^109781408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109781408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120648528).

109781408 is an abundant number, since it is smaller than the sum of its proper divisors (131515648).

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

109781408 is a wasteful number, since it uses less digits than its factorization.

109781408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317 (or 7309 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 109781408 is about 10477.6623347004. The cubic root of 109781408 is about 478.8243915876.

The spelling of 109781408 in words is "one hundred nine million, seven hundred eighty-one thousand, four hundred eight".