28260365328077 has 4 divisors (see below), whose sum is σ = 28262283770976. Its totient is φ = 28258446885180.

The previous prime is 28260365328053. The next prime is 28260365328137. The reversal of 28260365328077 is 77082356306282.

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-28260365328077 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 (28260365328977) 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, 959199353 + ... + 959228814.

It is an arithmetic number, because the mean of its divisors is an integer number (7065570942744).

Almost surely, 2^{28260365328077} is an apocalyptic number.

It is an amenable number.

28260365328077 is a deficient number, since it is larger than the sum of its proper divisors (1918442899).

28260365328077 is a wasteful number, since it uses less digits than its factorization.

28260365328077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918442898.

The product of its (nonzero) digits is 40642560, while the sum is 59.

The spelling of 28260365328077 in words is "twenty-eight trillion, two hundred sixty billion, three hundred sixty-five million, three hundred twenty-eight thousand, seventy-seven".