6622400 has 42 divisors (see below), whose sum is σ = 16299180. Its totient is φ = 2648320.

The previous prime is 6622391. The next prime is 6622423. The reversal of 6622400 is 42266.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 470 + ... + 3669.

Almost surely, 2^6622400 is an apocalyptic number.

It is an amenable number.

6622400 is an abundant number, since it is smaller than the sum of its proper divisors (9676780).

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

6622400 is a wasteful number, since it uses less digits than its factorization.

6622400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4161 (or 4146 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6622400 is about 2573.4024170347. The cubic root of 6622400 is about 187.7897150800.

Adding to 6622400 its reverse (42266), we get a palindrome (6664666).

The spelling of 6622400 in words is "six million, six hundred twenty-two thousand, four hundred".