9940240 has 40 divisors (see below), whose sum is σ = 24473880. Its totient is φ = 3741696.

The previous prime is 9940219. The next prime is 9940241. The reversal of 9940240 is 420499.

It can be written as a sum of positive squares in 4 ways, for example, as 1806336 + 8133904 = 1344^2 + 2852^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 9940199 and 9940208.

It is not an unprimeable number, because it can be changed into a prime (9940241) 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 7 ways as a sum of consecutive naturals, for example, 2295 + ... + 5014.

It is an arithmetic number, because the mean of its divisors is an integer number (611847).

Almost surely, 2^9940240 is an apocalyptic number.

It is an amenable number.

9940240 is an abundant number, since it is smaller than the sum of its proper divisors (14533640).

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

9940240 is a wasteful number, since it uses less digits than its factorization.

9940240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7339 (or 7333 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 9940240 is about 3152.8146155459. The cubic root of 9940240 is about 215.0134478699.

The spelling of 9940240 in words is "nine million, nine hundred forty thousand, two hundred forty".