989858972 has 12 divisors (see below), whose sum is σ = 1791986280. Its totient is φ = 477862896.

The previous prime is 989858971. The next prime is 989858999. The reversal of 989858972 is 279858989.

It is a junction number, because it is equal to n+sod(n) for n = 989858899 and 989858908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989858971) 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 3 ways as a sum of consecutive naturals, for example, 4266518 + ... + 4266749.

It is an arithmetic number, because the mean of its divisors is an integer number (149332190).

Almost surely, 2^989858972 is an apocalyptic number.

It is an amenable number.

989858972 is a deficient number, since it is larger than the sum of its proper divisors (802127308).

989858972 is a wasteful number, since it uses less digits than its factorization.

989858972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8533300 (or 8533298 counting only the distinct ones).

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

The square root of 989858972 is about 31462.0242832530. The cubic root of 989858972 is about 996.6081658013.

The spelling of 989858972 in words is "nine hundred eighty-nine million, eight hundred fifty-eight thousand, nine hundred seventy-two".