9918738 has 48 divisors (see below), whose sum is σ = 22567896. Its totient is φ = 3144960.

The previous prime is 9918721. The next prime is 9918743. The reversal of 9918738 is 8378199.

It can be written as a sum of positive squares in 4 ways, for example, as 9903609 + 15129 = 3147^2 + 123^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9918693 and 9918702.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 35158 + ... + 35438.

Almost surely, 2^9918738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9918738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11283948).

9918738 is an abundant number, since it is smaller than the sum of its proper divisors (12649158).

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

9918738 is a wasteful number, since it uses less digits than its factorization.

9918738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379 (or 376 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9918738 is about 3149.4028005322. The cubic root of 9918738 is about 214.8583021623.

It can be divided in two parts, 99187 and 38, that added together give a square (99225 = 315²).

The spelling of 9918738 in words is "nine million, nine hundred eighteen thousand, seven hundred thirty-eight".