989706747744 has 480 divisors, whose sum is σ = 3427056864000. Its totient is φ = 276234624000.

The previous prime is 989706747739. The next prime is 989706747767. The reversal of 989706747744 is 447747607989.

989706747744 is a `hidden beast` number, since 9 + 8 + 97 + 0 + 67 + 477 + 4 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 184954669 + ... + 184960019.

It is an arithmetic number, because the mean of its divisors is an integer number (7139701800).

Almost surely, 2^989706747744 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 989706747744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1713528432000).

989706747744 is an abundant number, since it is smaller than the sum of its proper divisors (2437350116256).

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

989706747744 is a wasteful number, since it uses less digits than its factorization.

989706747744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5896 (or 5879 counting only the distinct ones).

The product of its (nonzero) digits is 597445632, while the sum is 72.

The spelling of 989706747744 in words is "nine hundred eighty-nine billion, seven hundred six million, seven hundred forty-seven thousand, seven hundred forty-four".