6422688 has 72 divisors (see below), whose sum is σ = 18918900. Its totient is φ = 2064384.

The previous prime is 6422677. The next prime is 6422701. The reversal of 6422688 is 8862246.

6422688 is a `hidden beast` number, since 642 + 2 + 6 + 8 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6411024 + 11664 = 2532^2 + 108^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×6422688² = 82501842290688, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7968 + ... + 8736.

Almost surely, 2^6422688 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 6422688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9459450).

6422688 is an abundant number, since it is smaller than the sum of its proper divisors (12496212).

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

6422688 is a wasteful number, since it uses less digits than its factorization.

6422688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 803 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 6422688 is about 2534.3022708430. The cubic root of 6422688 is about 185.8826870374.

The spelling of 6422688 in words is "six million, four hundred twenty-two thousand, six hundred eighty-eight".