9891842 has 12 divisors (see below), whose sum is σ = 15369666. Its totient is φ = 4774560.

The previous prime is 9891823. The next prime is 9891851. The reversal of 9891842 is 2481989.

It can be written as a sum of positive squares in 3 ways, for example, as 9554281 + 337561 = 3091^2 + 581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 9891842.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1259 + ... + 4622.

Almost surely, 2^9891842 is an apocalyptic number.

9891842 is a deficient number, since it is larger than the sum of its proper divisors (5477824).

9891842 is a wasteful number, since it uses less digits than its factorization.

9891842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941 (or 5912 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 9891842 is about 3145.1298860301. The cubic root of 9891842 is about 214.6639205741.

The spelling of 9891842 in words is "nine million, eight hundred ninety-one thousand, eight hundred forty-two".