989951072 has 96 divisors (see below), whose sum is σ = 2369969280. Its totient is φ = 401172480.

The previous prime is 989951071. The next prime is 989951093. The reversal of 989951072 is 270159989.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 989951072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989951071) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109343 + ... + 118049.

It is an arithmetic number, because the mean of its divisors is an integer number (24687180).

Almost surely, 2^989951072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989951072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1184984640).

989951072 is an abundant number, since it is smaller than the sum of its proper divisors (1380018208).

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

989951072 is a wasteful number, since it uses less digits than its factorization.

989951072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764 (or 8756 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 50.

The square root of 989951072 is about 31463.4879185382. The cubic root of 989951072 is about 996.6390741657.

The spelling of 989951072 in words is "nine hundred eighty-nine million, nine hundred fifty-one thousand, seventy-two".