989796640 has 192 divisors, whose sum is σ = 2839415040. Its totient is φ = 318504960.

The previous prime is 989796637. The next prime is 989796653. The reversal of 989796640 is 46697989.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4106920 + ... + 4107160.

It is an arithmetic number, because the mean of its divisors is an integer number (14788620).

Almost surely, 2^989796640 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 989796640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1419707520).

989796640 is an abundant number, since it is smaller than the sum of its proper divisors (1849618400).

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

989796640 is a wasteful number, since it uses less digits than its factorization.

989796640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 58.

The square root of 989796640 is about 31461.0336765975. The cubic root of 989796640 is about 996.5872463619.

The spelling of 989796640 in words is "nine hundred eighty-nine million, seven hundred ninety-six thousand, six hundred forty".