9912378 has 64 divisors (see below), whose sum is σ = 23784192. Its totient is φ = 2695680.

The previous prime is 9912313. The next prime is 9912391. The reversal of 9912378 is 8732199.

9912378 is a nontrivial binomial coefficient, being equal to C(4453, 2).

It is a super-2 number, since 2×9912378² = 196510475229768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 135750 + ... + 135822.

It is an arithmetic number, because the mean of its divisors is an integer number (371628).

Almost surely, 2^9912378 is an apocalyptic number.

9912378 is the 4452-nd triangular number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9912378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11892096).

9912378 is an abundant number, since it is smaller than the sum of its proper divisors (13871814).

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

9912378 is a wasteful number, since it uses less digits than its factorization.

9912378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199.

The product of its digits is 27216, while the sum is 39.

The square root of 9912378 is about 3148.3929233817. The cubic root of 9912378 is about 214.8123692026.

The spelling of 9912378 in words is "nine million, nine hundred twelve thousand, three hundred seventy-eight".