6623744 has 40 divisors (see below), whose sum is σ = 14031468. Its totient is φ = 3112960.

The previous prime is 6623741. The next prime is 6623759. The reversal of 6623744 is 4473266.

It can be written as a sum of positive squares in 2 ways, for example, as 6310144 + 313600 = 2512^2 + 560^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 6623744.

It is not an unprimeable number, because it can be changed into a prime (6623741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8324 + ... + 9084.

Almost surely, 2^6623744 is an apocalyptic number.

6623744 is a gapful number since it is divisible by the number (64) 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 6623744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7015734).

6623744 is an abundant number, since it is smaller than the sum of its proper divisors (7407724).

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

6623744 is an equidigital number, since it uses as much as digits as its factorization.

6623744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 780 counting only the distinct ones).

The product of its digits is 24192, while the sum is 32.

The square root of 6623744 is about 2573.6635366730. The cubic root of 6623744 is about 187.8024180429.

The spelling of 6623744 in words is "six million, six hundred twenty-three thousand, seven hundred forty-four".