12072440 has 32 divisors (see below), whose sum is σ = 27373680. Its totient is φ = 4791552.

The previous prime is 12072419. The next prime is 12072457. The reversal of 12072440 is 4427021.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 4379 + ... + 6581.

Almost surely, 2^12072440 is an apocalyptic number.

12072440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12072440 is an abundant number, since it is smaller than the sum of its proper divisors (15301240).

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

12072440 is a wasteful number, since it uses less digits than its factorization.

12072440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2351 (or 2347 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 12072440 is about 3474.5416963968. The cubic root of 12072440 is about 229.4026084961.

Adding to 12072440 its reverse (4427021), we get a palindrome (16499461).

The spelling of 12072440 in words is "twelve million, seventy-two thousand, four hundred forty".