6988689408 has 104 divisors (see below), whose sum is σ = 18715189968. Its totient is φ = 2319450112.

The previous prime is 6988689401. The next prime is 6988689493. The reversal of 6988689408 is 8049868896.

It is a super-4 number, since 4×6988689408⁴ (a number of 40 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6988689401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3156910 + ... + 3159122.

Almost surely, 2^6988689408 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 6988689408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9357594984).

6988689408 is an abundant number, since it is smaller than the sum of its proper divisors (11726500560).

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

6988689408 is a wasteful number, since it uses less digits than its factorization.

6988689408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2497 (or 2475 counting only the distinct ones).

The product of its (nonzero) digits is 47775744, while the sum is 66.

The square root of 6988689408 is about 83598.3816111293. The cubic root of 6988689408 is about 1911.9003233461.

The spelling of 6988689408 in words is "six billion, nine hundred eighty-eight million, six hundred eighty-nine thousand, four hundred eight".