28508412739 has 4 divisors (see below), whose sum is σ = 28769957920. Its totient is φ = 28246867560.

The previous prime is 28508412733. The next prime is 28508412743. The reversal of 28508412739 is 93721480582.

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

It is a cyclic number.

It is not a de Polignac number, because 28508412739 - 2⁵ = 28508412707 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28508412692 and 28508412701.

It is not an unprimeable number, because it can be changed into a prime (28508412733) 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, 130772427 + ... + 130772644.

It is an arithmetic number, because the mean of its divisors is an integer number (7192489480).

Almost surely, 2^28508412739 is an apocalyptic number.

28508412739 is a deficient number, since it is larger than the sum of its proper divisors (261545181).

28508412739 is a wasteful number, since it uses less digits than its factorization.

28508412739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261545180.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 28508412739 in words is "twenty-eight billion, five hundred eight million, four hundred twelve thousand, seven hundred thirty-nine".