109065780 has 36 divisors (see below), whose sum is σ = 330833412. Its totient is φ = 29084160.

The previous prime is 109065739. The next prime is 109065787. The reversal of 109065780 is 87560901.

It can be written as a sum of positive squares in 2 ways, for example, as 22240656 + 86825124 = 4716^2 + 9318^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109065787) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 302781 + ... + 303140.

It is an arithmetic number, because the mean of its divisors is an integer number (9189817).

Almost surely, 2^109065780 is an apocalyptic number.

109065780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109065780 is an abundant number, since it is smaller than the sum of its proper divisors (221767632).

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

109065780 is a wasteful number, since it uses less digits than its factorization.

109065780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605936 (or 605931 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 109065780 is about 10443.4563244167. The cubic root of 109065780 is about 477.7816910122.

The spelling of 109065780 in words is "one hundred nine million, sixty-five thousand, seven hundred eighty".