12090040 has 32 divisors (see below), whose sum is σ = 27306000. Its totient is φ = 4817664.

The previous prime is 12090011. The next prime is 12090053. The reversal of 12090040 is 4009021.

It is a junction number, because it is equal to n+sod(n) for n = 12089996 and 12090023.

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 7 ways as a sum of consecutive naturals, for example, 15991 + ... + 16729.

Almost surely, 2^12090040 is an apocalyptic number.

12090040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12090040 is an abundant number, since it is smaller than the sum of its proper divisors (15215960).

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

12090040 is a wasteful number, since it uses less digits than its factorization.

12090040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 12090040 is about 3477.0734821111. The cubic root of 12090040 is about 229.5140337882.

Adding to 12090040 its reverse (4009021), we get a palindrome (16099061).

The spelling of 12090040 in words is "twelve million, ninety thousand, forty".