891608 has 16 divisors (see below), whose sum is σ = 1701000. Its totient is φ = 438016.

The previous prime is 891601. The next prime is 891617. The reversal of 891608 is 806198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891601) by changing a digit.

891608 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 3 ways as a sum of consecutive naturals, for example, 473 + ... + 1416.

2⁸⁹¹⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

891608 is a deficient number, since it is larger than the sum of its proper divisors (809392).

891608 is a wasteful number, since it uses less digits than its factorization.

891608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1950 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 891608 is about 944.2499669050. The cubic root of 891608 is about 96.2479124751.

The spelling of 891608 in words is "eight hundred ninety-one thousand, six hundred eight".