9797940 has 72 divisors (see below), whose sum is σ = 30761640. Its totient is φ = 2521344.

The previous prime is 9797917. The next prime is 9797959. The reversal of 9797940 is 497979.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 8328996 = 1212^2 + 2886^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4282 + ... + 6158.

It is an arithmetic number, because the mean of its divisors is an integer number (427245).

Almost surely, 2^9797940 is an apocalyptic number.

9797940 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 9797940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15380820).

9797940 is an abundant number, since it is smaller than the sum of its proper divisors (20963700).

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

9797940 is a wasteful number, since it uses less digits than its factorization.

9797940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1921 (or 1916 counting only the distinct ones).

The product of its (nonzero) digits is 142884, while the sum is 45.

The square root of 9797940 is about 3130.1661297765. The cubic root of 9797940 is about 213.9825006799.

The spelling of 9797940 in words is "nine million, seven hundred ninety-seven thousand, nine hundred forty".