9885555 has 12 divisors (see below), whose sum is σ = 17135040. Its totient is φ = 5272272.

The previous prime is 9885539. The next prime is 9885563. The reversal of 9885555 is 5555889.

9885555 is a `hidden beast` number, since 98 + 8 + 5 + 555 = 666.

It is not a de Polignac number, because 9885555 - 2⁴ = 9885539 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 219679 = 9885555 / (9 + 8 + 8 + 5 + 5 + 5 + 5).

9885555 is a lucky number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 9885555.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109795 + ... + 109884.

It is an arithmetic number, because the mean of its divisors is an integer number (1427920).

Almost surely, 2^9885555 is an apocalyptic number.

9885555 is a deficient number, since it is larger than the sum of its proper divisors (7249485).

9885555 is a wasteful number, since it uses less digits than its factorization.

9885555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219690 (or 219687 counting only the distinct ones).

The product of its digits is 360000, while the sum is 45.

The square root of 9885555 is about 3144.1302453938. The cubic root of 9885555 is about 214.6184326494.

It can be divided in two parts, 9885 and 555, that added together give a triangular number (10440 = T₁₄₄).

The spelling of 9885555 in words is "nine million, eight hundred eighty-five thousand, five hundred fifty-five".