6866240 has 56 divisors (see below), whose sum is σ = 16764000. Its totient is φ = 2677248.

The previous prime is 6866191. The next prime is 6866257. The reversal of 6866240 is 426686.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 6866197 and 6866206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13511 + ... + 14009.

Almost surely, 2^6866240 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 6866240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8382000).

6866240 is an abundant number, since it is smaller than the sum of its proper divisors (9897760).

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

6866240 is a wasteful number, since it uses less digits than its factorization.

6866240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 549 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 32.

The square root of 6866240 is about 2620.3511215102. The cubic root of 6866240 is about 190.0668278311.

The spelling of 6866240 in words is "six million, eight hundred sixty-six thousand, two hundred forty".