988491680 has 192 divisors, whose sum is σ = 2674788480. Its totient is φ = 341913600.

The previous prime is 988491671. The next prime is 988491683. The reversal of 988491680 is 86194889.

It is not an unprimeable number, because it can be changed into a prime (988491683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5461190 + ... + 5461370.

It is an arithmetic number, because the mean of its divisors is an integer number (13931190).

Almost surely, 2^988491680 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 988491680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1337394240).

988491680 is an abundant number, since it is smaller than the sum of its proper divisors (1686296800).

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

988491680 is a wasteful number, since it uses less digits than its factorization.

988491680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 53.

The square root of 988491680 is about 31440.2875304918. The cubic root of 988491680 is about 996.1490828059.

The spelling of 988491680 in words is "nine hundred eighty-eight million, four hundred ninety-one thousand, six hundred eighty".