12026640 has 40 divisors (see below), whose sum is σ = 37283328. Its totient is φ = 3207040.

The previous prime is 12026603. The next prime is 12026647. The reversal of 12026640 is 4662021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (12026647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24816 + ... + 25295.

Almost surely, 2^12026640 is an apocalyptic number.

12026640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12026640 is an abundant number, since it is smaller than the sum of its proper divisors (25256688).

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

12026640 is a wasteful number, since it uses less digits than its factorization.

12026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50127 (or 50121 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 12026640 is about 3467.9446362363. The cubic root of 12026640 is about 229.1121410039.

Adding to 12026640 its reverse (4662021), we get a palindrome (16688661).

The spelling of 12026640 in words is "twelve million, twenty-six thousand, six hundred forty".