6398208 has 54 divisors (see below), whose sum is σ = 18454254. Its totient is φ = 2131968.

The previous prime is 6398207. The next prime is 6398237. The reversal of 6398208 is 8028936.

It can be written as a sum of positive squares in only one way, i.e., 4460544 + 1937664 = 2112^2 + 1392^2 .

It is a super-2 number, since 2×6398208² = 81874131222528, which contains 22 as substring.

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 (6398201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 916 + ... + 3692.

Almost surely, 2^6398208 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 6398208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9227127).

6398208 is an abundant number, since it is smaller than the sum of its proper divisors (12056046).

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

6398208 is a wasteful number, since it uses less digits than its factorization.

6398208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2799 (or 2782 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 6398208 is about 2529.4679282410. The cubic root of 6398208 is about 185.6462231286.

The spelling of 6398208 in words is "six million, three hundred ninety-eight thousand, two hundred eight".