6623872 has 16 divisors (see below), whose sum is σ = 13196250. Its totient is φ = 3311872.

The previous prime is 6623857. The next prime is 6623873. The reversal of 6623872 is 2783266.

It can be written as a sum of positive squares in only one way, i.e., 5125696 + 1498176 = 2264^2 + 1224^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (6623873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25747 + ... + 26002.

Almost surely, 2^6623872 is an apocalyptic number.

It is an amenable number.

6623872 is a deficient number, since it is larger than the sum of its proper divisors (6572378).

6623872 is an equidigital number, since it uses as much as digits as its factorization.

6623872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51763 (or 51751 counting only the distinct ones).

The product of its digits is 24192, while the sum is 34.

The square root of 6623872 is about 2573.6884038282. The cubic root of 6623872 is about 187.8036277593.

Subtracting from 6623872 its reverse (2783266), we obtain a triangular number (3840606 = T₂₇₇₁).

The spelling of 6623872 in words is "six million, six hundred twenty-three thousand, eight hundred seventy-two".