9890857982 has 24 divisors (see below), whose sum is σ = 15475975704. Its totient is φ = 4739863392.

The previous prime is 9890857981. The next prime is 9890858069. The reversal of 9890857982 is 2897580989.

It is a super-2 number, since 2×9890857982² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9890857981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 156488 + ... + 210404.

It is an arithmetic number, because the mean of its divisors is an integer number (644832321).

Almost surely, 2^9890857982 is an apocalyptic number.

9890857982 is a deficient number, since it is larger than the sum of its proper divisors (5585117722).

9890857982 is a wasteful number, since it uses less digits than its factorization.

9890857982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54060 (or 54023 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 65.

The square root of 9890857982 is about 99452.7927310239. The cubic root of 9890857982 is about 2146.5680224476.

The spelling of 9890857982 in words is "nine billion, eight hundred ninety million, eight hundred fifty-seven thousand, nine hundred eighty-two".