6398420 has 36 divisors (see below), whose sum is σ = 15632820. Its totient is φ = 2193408.

The previous prime is 6398417. The next prime is 6398429. The reversal of 6398420 is 248936.

It can be written as a sum of positive squares in 2 ways, for example, as 1317904 + 5080516 = 1148^2 + 2254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398429) 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, 2285 + ... + 4244.

It is an arithmetic number, because the mean of its divisors is an integer number (434245).

Almost surely, 2^6398420 is an apocalyptic number.

It is an amenable number.

6398420 is an abundant number, since it is smaller than the sum of its proper divisors (9234400).

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

6398420 is a wasteful number, since it uses less digits than its factorization.

6398420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6552 (or 6543 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 6398420 is about 2529.5098339402. The cubic root of 6398420 is about 185.6482735238.

The spelling of 6398420 in words is "six million, three hundred ninety-eight thousand, four hundred twenty".