6899860 has 48 divisors (see below), whose sum is σ = 16047360. Its totient is φ = 2471040.

The previous prime is 6899819. The next prime is 6899863. The reversal of 6899860 is 689986.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a nialpdrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 6899860.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6899863) 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, 17182 + ... + 17578.

It is an arithmetic number, because the mean of its divisors is an integer number (334320).

Almost surely, 2^6899860 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 6899860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8023680).

6899860 is an abundant number, since it is smaller than the sum of its proper divisors (9147500).

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

6899860 is a wasteful number, since it uses less digits than its factorization.

6899860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 46.

The square root of 6899860 is about 2626.7584586330. The cubic root of 6899860 is about 190.3765386081.

The spelling of 6899860 in words is "six million, eight hundred ninety-nine thousand, eight hundred sixty".