988981720 has 64 divisors (see below), whose sum is σ = 2264371200. Its totient is φ = 388671360.

The previous prime is 988981703. The next prime is 988981723. The reversal of 988981720 is 27189889.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (988981723) 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 15 ways as a sum of consecutive naturals, for example, 1359997 + ... + 1360723.

It is an arithmetic number, because the mean of its divisors is an integer number (35380800).

Almost surely, 2^988981720 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 988981720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132185600).

988981720 is an abundant number, since it is smaller than the sum of its proper divisors (1275389480).

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

988981720 is a wasteful number, since it uses less digits than its factorization.

988981720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1288 (or 1284 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 52.

The square root of 988981720 is about 31448.0797505984. The cubic root of 988981720 is about 996.3136676517.

The spelling of 988981720 in words is "nine hundred eighty-eight million, nine hundred eighty-one thousand, seven hundred twenty".