9889740 has 144 divisors (see below), whose sum is σ = 35223552. Its totient is φ = 2199168.

The previous prime is 9889723. The next prime is 9889741. The reversal of 9889740 is 479889.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (9889741) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 59137 + ... + 59303.

It is an arithmetic number, because the mean of its divisors is an integer number (244608).

Almost surely, 2^9889740 is an apocalyptic number.

9889740 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9889740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17611776).

9889740 is an abundant number, since it is smaller than the sum of its proper divisors (25333812).

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

9889740 is a wasteful number, since it uses less digits than its factorization.

9889740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 9889740 is about 3144.7957008365. The cubic root of 9889740 is about 214.6487142547.

The spelling of 9889740 in words is "nine million, eight hundred eighty-nine thousand, seven hundred forty".