9770640 has 80 divisors (see below), whose sum is σ = 33051456. Its totient is φ = 2368000.

The previous prime is 9770633. The next prime is 9770647. The reversal of 9770640 is 460779.

It is an interprime number because it is at equal distance from previous prime (9770633) and next prime (9770647).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (9770647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 790 + ... + 4490.

Almost surely, 2^9770640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9770640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16525728).

9770640 is an abundant number, since it is smaller than the sum of its proper divisors (23280816).

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

9770640 is a wasteful number, since it uses less digits than its factorization.

9770640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3728 (or 3722 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 9770640 is about 3125.8022970111. The cubic root of 9770640 is about 213.7835759985.

The spelling of 9770640 in words is "nine million, seven hundred seventy thousand, six hundred forty".