9888390 has 96 divisors (see below), whose sum is σ = 28506816. Its totient is φ = 2365440.

The previous prime is 9888353. The next prime is 9888397. The reversal of 9888390 is 938889.

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9888397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35050 + ... + 35330.

It is an arithmetic number, because the mean of its divisors is an integer number (296946).

Almost surely, 2^9888390 is an apocalyptic number.

9888390 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9888390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14253408).

9888390 is an abundant number, since it is smaller than the sum of its proper divisors (18618426).

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

9888390 is a wasteful number, since it uses less digits than its factorization.

9888390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 331 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The square root of 9888390 is about 3144.5810531770. The cubic root of 9888390 is about 214.6389469285.

It can be divided in two parts, 98 and 88390, that added together give a palindrome (88488).

The spelling of 9888390 in words is "nine million, eight hundred eighty-eight thousand, three hundred ninety".