6888644 has 24 divisors (see below), whose sum is σ = 13836480. Its totient is φ = 2939616.

The previous prime is 6888641. The next prime is 6888647. The reversal of 6888644 is 4468886.

It is an interprime number because it is at equal distance from previous prime (6888641) and next prime (6888647).

It is a junction number, because it is equal to n+sod(n) for n = 6888595 and 6888604.

It is not an unprimeable number, because it can be changed into a prime (6888641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9362 + ... + 10070.

It is an arithmetic number, because the mean of its divisors is an integer number (576520).

Almost surely, 2^6888644 is an apocalyptic number.

It is an amenable number.

6888644 is an abundant number, since it is smaller than the sum of its proper divisors (6947836).

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

6888644 is a wasteful number, since it uses less digits than its factorization.

6888644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1065 counting only the distinct ones).

The product of its digits is 294912, while the sum is 44.

The square root of 6888644 is about 2624.6226395427. The cubic root of 6888644 is about 190.2733277561.

The spelling of 6888644 in words is "six million, eight hundred eighty-eight thousand, six hundred forty-four".