28308030527549 has 4 divisors (see below), whose sum is σ = 28317781832736. Its totient is φ = 28298279222364.

The previous prime is 28308030527537. The next prime is 28308030527551. The reversal of 28308030527549 is 94572503080382.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28308030527549 is a prime.

It is a super-2 number, since 2×28308030527549² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28308030527494 and 28308030527503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308030527599) 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, 4875648239 + ... + 4875654044.

It is an arithmetic number, because the mean of its divisors is an integer number (7079445458184).

Almost surely, 2^{28308030527549} is an apocalyptic number.

It is an amenable number.

28308030527549 is a deficient number, since it is larger than the sum of its proper divisors (9751305187).

28308030527549 is an equidigital number, since it uses as much as digits as its factorization.

28308030527549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751305186.

The product of its (nonzero) digits is 14515200, while the sum is 56.

The spelling of 28308030527549 in words is "twenty-eight trillion, three hundred eight billion, thirty million, five hundred twenty-seven thousand, five hundred forty-nine".