12018978 has 24 divisors (see below), whose sum is σ = 26213148. Its totient is φ = 3979872.

The previous prime is 12018977. The next prime is 12018997. The reversal of 12018978 is 87981021.

12018978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10712529 + 1306449 = 3273^2 + 1143^2 .

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (12018977) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 700 + ... + 4952.

Almost surely, 2^12018978 is an apocalyptic number.

12018978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12018978 is an abundant number, since it is smaller than the sum of its proper divisors (14194170).

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

12018978 is a wasteful number, since it uses less digits than its factorization.

12018978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4418 (or 4415 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 12018978 is about 3466.8397713191. The cubic root of 12018978 is about 229.0634759805.

Adding to 12018978 its reverse (87981021), we get a palindrome (99999999).

It can be divided in two parts, 12018 and 978, that added together give a square (12996 = 114²).

The spelling of 12018978 in words is "twelve million, eighteen thousand, nine hundred seventy-eight".