13928398357 has 4 divisors (see below), whose sum is σ = 14191198380. Its totient is φ = 13665598336.

The previous prime is 13928398303. The next prime is 13928398369. The reversal of 13928398357 is 75389382931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10719289156 + 3209109201 = 103534^2 + 56649^2 .

It is a cyclic number.

It is not a de Polignac number, because 13928398357 - 2¹⁵ = 13928365589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13928398387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131399932 + ... + 131400037.

It is an arithmetic number, because the mean of its divisors is an integer number (3547799595).

Almost surely, 2^13928398357 is an apocalyptic number.

It is an amenable number.

13928398357 is a deficient number, since it is larger than the sum of its proper divisors (262800023).

13928398357 is an equidigital number, since it uses as much as digits as its factorization.

13928398357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262800022.

The product of its digits is 9797760, while the sum is 58.

The spelling of 13928398357 in words is "thirteen billion, nine hundred twenty-eight million, three hundred ninety-eight thousand, three hundred fifty-seven".