9815982 has 16 divisors (see below), whose sum is σ = 21416832. Its totient is φ = 2974520.

The previous prime is 9815959. The next prime is 9815999. The reversal of 9815982 is 2895189.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74298 + ... + 74429.

It is an arithmetic number, because the mean of its divisors is an integer number (1338552).

Almost surely, 2^9815982 is an apocalyptic number.

9815982 is an abundant number, since it is smaller than the sum of its proper divisors (11600850).

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

9815982 is a wasteful number, since it uses less digits than its factorization.

9815982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148743.

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

The square root of 9815982 is about 3133.0467599447. The cubic root of 9815982 is about 214.1137631360.

The spelling of 9815982 in words is "nine million, eight hundred fifteen thousand, nine hundred eighty-two".