9765990 has 96 divisors (see below), whose sum is σ = 29012256. Its totient is φ = 2257920.

The previous prime is 9765967. The next prime is 9765991. The reversal of 9765990 is 995679.

9765990 is a nontrivial binomial coefficient, being equal to C(4420, 2).

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 (9765991) 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, 19645 + ... + 20135.

It is an arithmetic number, because the mean of its divisors is an integer number (302211).

Almost surely, 2^9765990 is an apocalyptic number.

9765990 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

9765990 is the 4419-th triangular number and also the 2210-th hexagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9765990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14506128).

9765990 is an abundant number, since it is smaller than the sum of its proper divisors (19246266).

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

9765990 is a wasteful number, since it uses less digits than its factorization.

9765990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 531 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 9765990 is about 3125.0583994543. The cubic root of 9765990 is about 213.7496563040.

The spelling of 9765990 in words is "nine million, seven hundred sixty-five thousand, nine hundred ninety".