9945740 has 48 divisors (see below), whose sum is σ = 25132800. Its totient is φ = 3229632.

The previous prime is 9945709. The next prime is 9945743. The reversal of 9945740 is 475499.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a d-powerful number, because it can be written as 9⁷ + 9⁷ + 4 + 5 + 7⁶ + 4⁹ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 9945694 and 9945703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945743) 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 15 ways as a sum of consecutive naturals, for example, 791 + ... + 4529.

It is an arithmetic number, because the mean of its divisors is an integer number (523600).

Almost surely, 2^9945740 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 9945740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12566400).

9945740 is an abundant number, since it is smaller than the sum of its proper divisors (15187060).

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

9945740 is a wasteful number, since it uses less digits than its factorization.

9945740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3774 (or 3772 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 9945740 is about 3153.6867314304. The cubic root of 9945740 is about 215.0530966752.

The spelling of 9945740 in words is "nine million, nine hundred forty-five thousand, seven hundred forty".