12003978 has 32 divisors (see below), whose sum is σ = 27555840. Its totient is φ = 3414960.

The previous prime is 12003977. The next prime is 12003997. The reversal of 12003978 is 87930021.

It is a happy number.

12003978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12003977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12603 + ... + 13521.

It is an arithmetic number, because the mean of its divisors is an integer number (861120).

Almost surely, 2^12003978 is an apocalyptic number.

12003978 is an abundant number, since it is smaller than the sum of its proper divisors (15551862).

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

12003978 is a wasteful number, since it uses less digits than its factorization.

12003978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 12003978 is about 3464.6757424036. The cubic root of 12003978 is about 228.9681439005.

Adding to 12003978 its reverse (87930021), we get a palindrome (99933999).

The spelling of 12003978 in words is "twelve million, three thousand, nine hundred seventy-eight".