109839780 has 96 divisors (see below), whose sum is σ = 345098880. Its totient is φ = 29001600.

The previous prime is 109839773. The next prime is 109839781. The reversal of 109839780 is 87938901.

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

It is not an unprimeable number, because it can be changed into a prime (109839781) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56830 + ... + 58730.

It is an arithmetic number, because the mean of its divisors is an integer number (3594780).

Almost surely, 2^109839780 is an apocalyptic number.

109839780 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 109839780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172549440).

109839780 is an abundant number, since it is smaller than the sum of its proper divisors (235259100).

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

109839780 is a wasteful number, since it uses less digits than its factorization.

109839780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2018 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 109839780 is about 10480.4475095294. The cubic root of 109839780 is about 478.9092419753.

The spelling of 109839780 in words is "one hundred nine million, eight hundred thirty-nine thousand, seven hundred eighty".