6989903388 has 144 divisors (see below), whose sum is σ = 20138270880. Its totient is φ = 2026487808.

The previous prime is 6989903387. The next prime is 6989903477. The reversal of 6989903388 is 8833099896.

It is a super-3 number, since 3×6989903388³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6989903387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1714120 + ... + 1718192.

Almost surely, 2^6989903388 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 6989903388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10069135440).

6989903388 is an abundant number, since it is smaller than the sum of its proper divisors (13148367492).

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

6989903388 is a wasteful number, since it uses less digits than its factorization.

6989903388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308 (or 4303 counting only the distinct ones).

The product of its (nonzero) digits is 20155392, while the sum is 63.

The square root of 6989903388 is about 83605.6420823380. The cubic root of 6989903388 is about 1912.0110200371.

The spelling of 6989903388 in words is "six billion, nine hundred eighty-nine million, nine hundred three thousand, three hundred eighty-eight".