9861144 has 24 divisors (see below), whose sum is σ = 24691380. Its totient is φ = 3281920.

The previous prime is 9861143. The next prime is 9861151. The reversal of 9861144 is 4411689.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9861143) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15064 + ... + 15704.

Almost surely, 2^9861144 is an apocalyptic number.

It is an amenable number.

9861144 is an abundant number, since it is smaller than the sum of its proper divisors (14830236).

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

9861144 is an equidigital number, since it uses as much as digits as its factorization.

9861144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1291 (or 646 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 9861144 is about 3140.2458502480. The cubic root of 9861144 is about 214.4416302728.

The spelling of 9861144 in words is "nine million, eight hundred sixty-one thousand, one hundred forty-four".