109212860 has 48 divisors (see below), whose sum is σ = 235309536. Its totient is φ = 42561792.

The previous prime is 109212853. The next prime is 109212911. The reversal of 109212860 is 68212901.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 208559 + ... + 209081.

It is an arithmetic number, because the mean of its divisors is an integer number (4902282).

Almost surely, 2^109212860 is an apocalyptic number.

109212860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

109212860 is an abundant number, since it is smaller than the sum of its proper divisors (126096676).

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

109212860 is a wasteful number, since it uses less digits than its factorization.

109212860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782 (or 780 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 109212860 is about 10450.4956820239. The cubic root of 109212860 is about 477.9963644151.

The spelling of 109212860 in words is "one hundred nine million, two hundred twelve thousand, eight hundred sixty".