5638698398 has 16 divisors (see below), whose sum is σ = 8688911280. Its totient is φ = 2742434496.

The previous prime is 5638698353. The next prime is 5638698409. The reversal of 5638698398 is 8938968365.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375890 + ... + 390602.

It is an arithmetic number, because the mean of its divisors is an integer number (543056955).

Almost surely, 2^5638698398 is an apocalyptic number.

5638698398 is a deficient number, since it is larger than the sum of its proper divisors (3050212882).

5638698398 is a wasteful number, since it uses less digits than its factorization.

5638698398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19931.

The product of its digits is 67184640, while the sum is 65.

The square root of 5638698398 is about 75091.2671220828. The cubic root of 5638698398 is about 1779.8891482960.

The spelling of 5638698398 in words is "five billion, six hundred thirty-eight million, six hundred ninety-eight thousand, three hundred ninety-eight".