6623388 has 36 divisors (see below), whose sum is σ = 16832088. Its totient is φ = 2196000.

The previous prime is 6623371. The next prime is 6623389. The reversal of 6623388 is 8833266.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6623389) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8670 + ... + 9402.

It is an arithmetic number, because the mean of its divisors is an integer number (467558).

Almost surely, 2^6623388 is an apocalyptic number.

It is an amenable number.

6623388 is an abundant number, since it is smaller than the sum of its proper divisors (10208700).

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

6623388 is a wasteful number, since it uses less digits than its factorization.

6623388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 989 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 6623388 is about 2573.5943736339. The cubic root of 6623388 is about 187.7990534373.

The spelling of 6623388 in words is "six million, six hundred twenty-three thousand, three hundred eighty-eight".