6398998935 has 96 divisors (see below), whose sum is σ = 12512143872. Its totient is φ = 2779096320.

The previous prime is 6398998919. The next prime is 6398998939. The reversal of 6398998935 is 5398998936.

It is not a de Polignac number, because 6398998935 - 2⁴ = 6398998919 is a prime.

It is a super-2 number, since 2×6398998935² = 81894374740262268450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (69).

It is a self number, because there is not a number n which added to its sum of digits gives 6398998935.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6398998939) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2652880 + ... + 2655290.

It is an arithmetic number, because the mean of its divisors is an integer number (130334832).

Almost surely, 2^6398998935 is an apocalyptic number.

6398998935 is a deficient number, since it is larger than the sum of its proper divisors (6113144937).

6398998935 is a wasteful number, since it uses less digits than its factorization.

6398998935 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613 (or 2606 counting only the distinct ones).

The product of its digits is 113374080, while the sum is 69.

The square root of 6398998935 is about 79993.7430990699. The cubic root of 6398998935 is about 1856.5387256449.

Subtracting from 6398998935 its reverse (5398998936), we obtain a palindrome (999999999).

The spelling of 6398998935 in words is "six billion, three hundred ninety-eight million, nine hundred ninety-eight thousand, nine hundred thirty-five".