9757980 has 72 divisors (see below), whose sum is σ = 30899232. Its totient is φ = 2487936.

The previous prime is 9757931. The next prime is 9757981. The reversal of 9757980 is 897579.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9757981) 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 23 ways as a sum of consecutive naturals, for example, 2962 + ... + 5318.

It is an arithmetic number, because the mean of its divisors is an integer number (429156).

Almost surely, 2^9757980 is an apocalyptic number.

9757980 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 9757980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15449616).

9757980 is an abundant number, since it is smaller than the sum of its proper divisors (21141252).

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

9757980 is a wasteful number, since it uses less digits than its factorization.

9757980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2395 (or 2390 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 9757980 is about 3123.7765605113. The cubic root of 9757980 is about 213.6912016378.

The spelling of 9757980 in words is "nine million, seven hundred fifty-seven thousand, nine hundred eighty".