688903980 has 48 divisors (see below), whose sum is σ = 1946646240. Its totient is φ = 182020608.

The previous prime is 688903973. The next prime is 688903987. The reversal of 688903980 is 89309886.

688903980 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (688903973) and next prime (688903987).

It is not an unprimeable number, because it can be changed into a prime (688903987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46129 + ... + 59208.

It is an arithmetic number, because the mean of its divisors is an integer number (40555130).

Almost surely, 2^688903980 is an apocalyptic number.

688903980 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

688903980 is an abundant number, since it is smaller than the sum of its proper divisors (1257742260).

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

688903980 is a wasteful number, since it uses less digits than its factorization.

688903980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105458 (or 105456 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 51.

The square root of 688903980 is about 26246.9803977524. The cubic root of 688903980 is about 883.1874678649.

The spelling of 688903980 in words is "six hundred eighty-eight million, nine hundred three thousand, nine hundred eighty".