12040000 has 140 divisors (see below), whose sum is σ = 34913824. Its totient is φ = 4032000.

The previous prime is 12039991. The next prime is 12040001. The reversal of 12040000 is 4021.

It is a tau number, because it is divible by the number of its divisors (140).

It is a Harshad number since it is a multiple of its sum of digits (7).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12040001) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 279979 + ... + 280021.

Almost surely, 2^12040000 is an apocalyptic number.

12040000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12040000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17456912).

12040000 is an abundant number, since it is smaller than the sum of its proper divisors (22873824).

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

12040000 is an frugal number, since it uses more digits than its factorization.

12040000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 7.

The square root of 12040000 is about 3469.8703145795. The cubic root of 12040000 is about 229.1969473302.

Adding to 12040000 its reverse (4021), we get a palindrome (12044021).

The spelling of 12040000 in words is "twelve million, forty thousand".