6403398 has 16 divisors (see below), whose sum is σ = 12835056. Its totient is φ = 2129760.

The previous prime is 6403393. The next prime is 6403417. The reversal of 6403398 is 8933046.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6403393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2808 + ... + 4548.

It is an arithmetic number, because the mean of its divisors is an integer number (802191).

Almost surely, 2^6403398 is an apocalyptic number.

6403398 is an abundant number, since it is smaller than the sum of its proper divisors (6431658).

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

6403398 is a wasteful number, since it uses less digits than its factorization.

6403398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2359.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 6403398 is about 2530.4936277335. The cubic root of 6403398 is about 185.6964061119.

The spelling of 6403398 in words is "six million, four hundred three thousand, three hundred ninety-eight".