28713479911 has 4 divisors (see below), whose sum is σ = 28939570432. Its totient is φ = 28487389392.

The previous prime is 28713479891. The next prime is 28713479923. The reversal of 28713479911 is 11997431782.

It is a happy number.

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 28713479911 - 2¹³ = 28713471719 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 (28713479941) 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, 113045070 + ... + 113045323.

It is an arithmetic number, because the mean of its divisors is an integer number (7234892608).

Almost surely, 2^28713479911 is an apocalyptic number.

28713479911 is a deficient number, since it is larger than the sum of its proper divisors (226090521).

28713479911 is a wasteful number, since it uses less digits than its factorization.

28713479911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226090520.

The product of its digits is 762048, while the sum is 52.

The spelling of 28713479911 in words is "twenty-eight billion, seven hundred thirteen million, four hundred seventy-nine thousand, nine hundred eleven".