28349016692389 has 4 divisors (see below), whose sum is σ = 28363240987756. Its totient is φ = 28334792397024.

The previous prime is 28349016692387. The next prime is 28349016692401. The reversal of 28349016692389 is 98329661094382.

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 9202528743489 + 19146487948900 = 3033567^2 + 4375670^2 .

It is a cyclic number.

It is not a de Polignac number, because 28349016692389 - 2¹ = 28349016692387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28349016692387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7112144694 + ... + 7112148679.

It is an arithmetic number, because the mean of its divisors is an integer number (7090810246939).

Almost surely, 2^{28349016692389} is an apocalyptic number.

It is an amenable number.

28349016692389 is a deficient number, since it is larger than the sum of its proper divisors (14224295367).

28349016692389 is a wasteful number, since it uses less digits than its factorization.

28349016692389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14224295366.

The product of its (nonzero) digits is 241864704, while the sum is 70.

The spelling of 28349016692389 in words is "twenty-eight trillion, three hundred forty-nine billion, sixteen million, six hundred ninety-two thousand, three hundred eighty-nine".