9866448 has 100 divisors (see below), whose sum is σ = 29887968. Its totient is φ = 3136320.

The previous prime is 9866431. The next prime is 9866449. The reversal of 9866448 is 8446689.

It is a happy number.

It is a super-2 number, since 2×9866448² = 194693592273408, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866449) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 29643 + ... + 29973.

Almost surely, 2^9866448 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9866448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14943984).

9866448 is an abundant number, since it is smaller than the sum of its proper divisors (20021520).

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

9866448 is a wasteful number, since it uses less digits than its factorization.

9866448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 359 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 9866448 is about 3141.0902565829. The cubic root of 9866448 is about 214.4800705236.

The spelling of 9866448 in words is "nine million, eight hundred sixty-six thousand, four hundred forty-eight".