12009240 has 48 divisors (see below), whose sum is σ = 39031200. Its totient is φ = 3202368.

The previous prime is 12009233. The next prime is 12009329. The reversal of 12009240 is 4290021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16320 + ... + 17039.

It is an arithmetic number, because the mean of its divisors is an integer number (813150).

Almost surely, 2^12009240 is an apocalyptic number.

12009240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12009240 is an abundant number, since it is smaller than the sum of its proper divisors (27021960).

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

12009240 is a wasteful number, since it uses less digits than its factorization.

12009240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33376 (or 33369 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 12009240 is about 3465.4350376251. The cubic root of 12009240 is about 229.0015954327.

Adding to 12009240 its reverse (4290021), we get a palindrome (16299261).

It can be divided in two parts, 1200 and 9240, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 12009240 in words is "twelve million, nine thousand, two hundred forty".