8991285 has 8 divisors (see below), whose sum is σ = 14386080. Its totient is φ = 4795344.

The previous prime is 8991253. The next prime is 8991289. The reversal of 8991285 is 5821998.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8991285 - 2⁵ = 8991253 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299695 + ... + 299724.

It is an arithmetic number, because the mean of its divisors is an integer number (1798260).

Almost surely, 2^8991285 is an apocalyptic number.

It is an amenable number.

8991285 is a deficient number, since it is larger than the sum of its proper divisors (5394795).

8991285 is a wasteful number, since it uses less digits than its factorization.

8991285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599427.

The product of its digits is 51840, while the sum is 42.

The square root of 8991285 is about 2998.5471482036. The cubic root of 8991285 is about 207.9412201387.

The spelling of 8991285 in words is "eight million, nine hundred ninety-one thousand, two hundred eighty-five".