6899040 has 96 divisors (see below), whose sum is σ = 24161760. Its totient is φ = 1838592.

The previous prime is 6899027. The next prime is 6899069. The reversal of 6899040 is 409986.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6898986 and 6899004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3522 + ... + 5118.

It is an arithmetic number, because the mean of its divisors is an integer number (251685).

Almost surely, 2^6899040 is an apocalyptic number.

6899040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6899040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12080880).

6899040 is an abundant number, since it is smaller than the sum of its proper divisors (17262720).

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

6899040 is a wasteful number, since it uses less digits than its factorization.

6899040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1621 (or 1607 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6899040 is about 2626.6023680793. The cubic root of 6899040 is about 190.3689966703.

The spelling of 6899040 in words is "six million, eight hundred ninety-nine thousand, forty".