6621396 has 48 divisors (see below), whose sum is σ = 16329600. Its totient is φ = 2084992.

The previous prime is 6621379. The next prime is 6621413. The reversal of 6621396 is 6931266.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6621379) and next prime (6621413).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18265 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

Almost surely, 2^6621396 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 6621396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8164800).

6621396 is an abundant number, since it is smaller than the sum of its proper divisors (9708204).

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

6621396 is a wasteful number, since it uses less digits than its factorization.

6621396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its digits is 11664, while the sum is 33.

The square root of 6621396 is about 2573.2073371573. The cubic root of 6621396 is about 187.7802245427.

The spelling of 6621396 in words is "six million, six hundred twenty-one thousand, three hundred ninety-six".