9918855 has 40 divisors (see below), whose sum is σ = 18730800. Its totient is φ = 5007744.

The previous prime is 9918851. The next prime is 9918877. The reversal of 9918855 is 5588199.

It is not a de Polignac number, because 9918855 - 2² = 9918851 is a prime.

It is a super-2 number, since 2×9918855² = 196767369022050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 9918855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9918851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7051 + ... + 8339.

It is an arithmetic number, because the mean of its divisors is an integer number (468270).

Almost surely, 2^9918855 is an apocalyptic number.

9918855 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

9918855 is a deficient number, since it is larger than the sum of its proper divisors (8811945).

9918855 is a wasteful number, since it uses less digits than its factorization.

9918855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325 (or 1316 counting only the distinct ones).

The product of its digits is 129600, while the sum is 45.

The square root of 9918855 is about 3149.4213754276. The cubic root of 9918855 is about 214.8591469715.

The spelling of 9918855 in words is "nine million, nine hundred eighteen thousand, eight hundred fifty-five".