9856491 has 16 divisors (see below), whose sum is σ = 13677600. Its totient is φ = 6306048.

The previous prime is 9856487. The next prime is 9856493. The reversal of 9856491 is 1946589.

It is not a de Polignac number, because 9856491 - 2² = 9856487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9856493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23895 + ... + 24303.

It is an arithmetic number, because the mean of its divisors is an integer number (854850).

Almost surely, 2^9856491 is an apocalyptic number.

9856491 is a deficient number, since it is larger than the sum of its proper divisors (3821109).

9856491 is a wasteful number, since it uses less digits than its factorization.

9856491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718.

The product of its digits is 77760, while the sum is 42.

The square root of 9856491 is about 3139.5048972728. The cubic root of 9856491 is about 214.4078967329.

The spelling of 9856491 in words is "nine million, eight hundred fifty-six thousand, four hundred ninety-one".