6899984 has 60 divisors (see below), whose sum is σ = 16772364. Its totient is φ = 2725632.

The previous prime is 6899969. The next prime is 6899989. The reversal of 6899984 is 4899986.

It can be written as a sum of positive squares in 2 ways, for example, as 4528384 + 2371600 = 2128^2 + 1540^2 .

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9854 + ... + 10530.

Almost surely, 2^6899984 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 6899984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8386182).

6899984 is an abundant number, since it is smaller than the sum of its proper divisors (9872380).

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

6899984 is a wasteful number, since it uses less digits than its factorization.

6899984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 699 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 53.

The square root of 6899984 is about 2626.7820617630. The cubic root of 6899984 is about 190.3776790443.

The spelling of 6899984 in words is "six million, eight hundred ninety-nine thousand, nine hundred eighty-four".