9788940 has 144 divisors (see below), whose sum is σ = 36009792. Its totient is φ = 2101248.

The previous prime is 9788939. The next prime is 9788951. The reversal of 9788940 is 498879.

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

It is an unprimeable number.

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, 21192 + ... + 21648.

It is an arithmetic number, because the mean of its divisors is an integer number (250068).

Almost surely, 2^9788940 is an apocalyptic number.

9788940 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 9788940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18004896).

9788940 is an abundant number, since it is smaller than the sum of its proper divisors (26220852).

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

9788940 is a wasteful number, since it uses less digits than its factorization.

9788940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 491 counting only the distinct ones).

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

The square root of 9788940 is about 3128.7281761125. The cubic root of 9788940 is about 213.9169619893.

The spelling of 9788940 in words is "nine million, seven hundred eighty-eight thousand, nine hundred forty".