109778940 has 72 divisors (see below), whose sum is σ = 338672880. Its totient is φ = 28775424.

The previous prime is 109778939. The next prime is 109778951. The reversal of 109778940 is 49877901.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 5452 + ... + 15788.

It is an arithmetic number, because the mean of its divisors is an integer number (4703790).

Almost surely, 2^109778940 is an apocalyptic number.

109778940 is a gapful number since it is divisible by the number (10) 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 109778940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (169336440).

109778940 is an abundant number, since it is smaller than the sum of its proper divisors (228893940).

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

109778940 is a wasteful number, since it uses less digits than its factorization.

109778940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10411 (or 10406 counting only the distinct ones).

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

The square root of 109778940 is about 10477.5445596762. The cubic root of 109778940 is about 478.8208034043.

The spelling of 109778940 in words is "one hundred nine million, seven hundred seventy-eight thousand, nine hundred forty".