9918544 has 10 divisors (see below), whose sum is σ = 19217210. Its totient is φ = 4959264.

The previous prime is 9918533. The next prime is 9918547. The reversal of 9918544 is 4458199.

It can be written as a sum of positive squares in only one way, i.e., 9072144 + 846400 = 3012^2 + 920^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9918497 and 9918506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9918547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309939 + ... + 309970.

It is an arithmetic number, because the mean of its divisors is an integer number (1921721).

Almost surely, 2^9918544 is an apocalyptic number.

It is an amenable number.

9918544 is a deficient number, since it is larger than the sum of its proper divisors (9298666).

9918544 is a wasteful number, since it uses less digits than its factorization.

9918544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 619917 (or 619911 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 9918544 is about 3149.3720008916. The cubic root of 9918544 is about 214.8569013530.

The spelling of 9918544 in words is "nine million, nine hundred eighteen thousand, five hundred forty-four".