9971838 has 12 divisors (see below), whose sum is σ = 21605688. Its totient is φ = 3323940.

The previous prime is 9971837. The next prime is 9971839. The reversal of 9971838 is 8381799.

It is an interprime number because it is at equal distance from previous prime (9971837) and next prime (9971839).

It is a junction number, because it is equal to n+sod(n) for n = 9971793 and 9971802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971837) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 276978 + ... + 277013.

It is an arithmetic number, because the mean of its divisors is an integer number (1800474).

Almost surely, 2^9971838 is an apocalyptic number.

9971838 is an abundant number, since it is smaller than the sum of its proper divisors (11633850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9971838 is a wasteful number, since it uses less digits than its factorization.

9971838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553999 (or 553996 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 9971838 is about 3157.8217175768. The cubic root of 9971838 is about 215.2410348866.

The spelling of 9971838 in words is "nine million, nine hundred seventy-one thousand, eight hundred thirty-eight".