6635398 has 24 divisors (see below), whose sum is σ = 12506256. Its totient is φ = 2584560.

The previous prime is 6635359. The next prime is 6635407. The reversal of 6635398 is 8935366.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 6635398.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 265 + ... + 3652.

It is an arithmetic number, because the mean of its divisors is an integer number (521094).

Almost surely, 2^6635398 is an apocalyptic number.

6635398 is a deficient number, since it is larger than the sum of its proper divisors (5870858).

6635398 is a wasteful number, since it uses less digits than its factorization.

6635398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3948 (or 3937 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 6635398 is about 2575.9266293899. The cubic root of 6635398 is about 187.9124951153.

Subtracting 6635398 from its reverse (8935366), we obtain a cube (2299968 = 132³).

The spelling of 6635398 in words is "six million, six hundred thirty-five thousand, three hundred ninety-eight".