988809680 has 20 divisors (see below), whose sum is σ = 2298982692. Its totient is φ = 395523840.

The previous prime is 988809667. The next prime is 988809727. The reversal of 988809680 is 86908889.

It can be written as a sum of positive squares in 2 ways, for example, as 383846464 + 604963216 = 19592^2 + 24596^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6179981 + ... + 6180140.

Almost surely, 2^988809680 is an apocalyptic number.

It is an amenable number.

988809680 is an abundant number, since it is smaller than the sum of its proper divisors (1310173012).

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

988809680 is a wasteful number, since it uses less digits than its factorization.

988809680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12360134 (or 12360128 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 56.

The square root of 988809680 is about 31445.3443294870. The cubic root of 988809680 is about 996.2558924877.

The spelling of 988809680 in words is "nine hundred eighty-eight million, eight hundred nine thousand, six hundred eighty".