28249038679 has 4 divisors (see below), whose sum is σ = 29477257776. Its totient is φ = 27020819584.

The previous prime is 28249038677. The next prime is 28249038683. The reversal of 28249038679 is 97683094282.

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 28249038679 - 2¹ = 28249038677 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 (28249038677) 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, 614109514 + ... + 614109559.

It is an arithmetic number, because the mean of its divisors is an integer number (7369314444).

Almost surely, 2^28249038679 is an apocalyptic number.

28249038679 is a deficient number, since it is larger than the sum of its proper divisors (1228219097).

28249038679 is a wasteful number, since it uses less digits than its factorization.

28249038679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1228219096.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 28249038679 in words is "twenty-eight billion, two hundred forty-nine million, thirty-eight thousand, six hundred seventy-nine".