109645380 has 96 divisors (see below), whose sum is σ = 367382400. Its totient is φ = 26987904.

The previous prime is 109645379. The next prime is 109645387. The reversal of 109645380 is 83546901.

109645380 is a `hidden beast` number, since 1 + 0 + 9 + 645 + 3 + 8 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (109645387) 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, 790 + ... + 14829.

It is an arithmetic number, because the mean of its divisors is an integer number (3826900).

Almost surely, 2^109645380 is an apocalyptic number.

109645380 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 109645380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183691200).

109645380 is an abundant number, since it is smaller than the sum of its proper divisors (257737020).

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

109645380 is a wasteful number, since it uses less digits than its factorization.

109645380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15650 (or 15642 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 109645380 is about 10471.1689891817. The cubic root of 109645380 is about 478.6265425287.

The spelling of 109645380 in words is "one hundred nine million, six hundred forty-five thousand, three hundred eighty".