12309860 has 12 divisors (see below), whose sum is σ = 25850748. Its totient is φ = 4923936.

The previous prime is 12309811. The next prime is 12309877. The reversal of 12309860 is 6890321.

It can be written as a sum of positive squares in 2 ways, for example, as 9012004 + 3297856 = 3002^2 + 1816^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307727 + ... + 307766.

It is an arithmetic number, because the mean of its divisors is an integer number (2154229).

Almost surely, 2^12309860 is an apocalyptic number.

12309860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12309860 is an abundant number, since it is smaller than the sum of its proper divisors (13540888).

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

12309860 is a wasteful number, since it uses less digits than its factorization.

12309860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615502 (or 615500 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 12309860 is about 3508.5410073134. The cubic root of 12309860 is about 230.8966886212.

The spelling of 12309860 in words is "twelve million, three hundred nine thousand, eight hundred sixty".