9442640 has 20 divisors (see below), whose sum is σ = 21954324. Its totient is φ = 3777024.

The previous prime is 9442637. The next prime is 9442649. The reversal of 9442640 is 462449.

It can be written as a sum of positive squares in 2 ways, for example, as 1308736 + 8133904 = 1144^2 + 2852^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9442649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58937 + ... + 59096.

Almost surely, 2^9442640 is an apocalyptic number.

It is an amenable number.

9442640 is an abundant number, since it is smaller than the sum of its proper divisors (12511684).

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

9442640 is a wasteful number, since it uses less digits than its factorization.

9442640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118046 (or 118040 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 9442640 is about 3072.8878925206. The cubic root of 9442640 is about 211.3640608084.

The spelling of 9442640 in words is "nine million, four hundred forty-two thousand, six hundred forty".