109213780 has 48 divisors (see below), whose sum is σ = 261530640. Its totient is φ = 37951488.

The previous prime is 109213757. The next prime is 109213789. The reversal of 109213780 is 87312901.

It can be written as a sum of positive squares in 8 ways, for example, as 94864 + 109118916 = 308^2 + 10446^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109213789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7935 + ... + 16774.

It is an arithmetic number, because the mean of its divisors is an integer number (5448555).

Almost surely, 2^109213780 is an apocalyptic number.

109213780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109213780 is an abundant number, since it is smaller than the sum of its proper divisors (152316860).

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

109213780 is a wasteful number, since it uses less digits than its factorization.

109213780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24748 (or 24746 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 109213780 is about 10450.5396989821. The cubic root of 109213780 is about 477.9977066118.

The spelling of 109213780 in words is "one hundred nine million, two hundred thirteen thousand, seven hundred eighty".