12396978 has 96 divisors (see below), whose sum is σ = 32348160. Its totient is φ = 3386880.

The previous prime is 12396973. The next prime is 12396983. The reversal of 12396978 is 87969321.

It is an interprime number because it is at equal distance from previous prime (12396973) and next prime (12396983).

Its product of digits (163296) is a multiple of the sum of its prime divisors (189).

It is not an unprimeable number, because it can be changed into a prime (12396973) 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 47 ways as a sum of consecutive naturals, for example, 97551 + ... + 97677.

It is an arithmetic number, because the mean of its divisors is an integer number (336960).

Almost surely, 2^12396978 is an apocalyptic number.

12396978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12396978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16174080).

12396978 is an abundant number, since it is smaller than the sum of its proper divisors (19951182).

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

12396978 is a wasteful number, since it uses less digits than its factorization.

12396978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192 (or 189 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 12396978 is about 3520.9342510192. The cubic root of 12396978 is about 231.4401009998.

The spelling of 12396978 in words is "twelve million, three hundred ninety-six thousand, nine hundred seventy-eight".