28931271243367 has 4 divisors (see below), whose sum is σ = 30453969729880. Its totient is φ = 27408572756856.

The previous prime is 28931271243349. The next prime is 28931271243439. The reversal of 28931271243367 is 76334217213982.

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 28931271243367 - 2²⁷ = 28931137025639 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 (28931271243337) 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, 761349243228 + ... + 761349243265.

It is an arithmetic number, because the mean of its divisors is an integer number (7613492432470).

Almost surely, 2^{28931271243367} is an apocalyptic number.

28931271243367 is a deficient number, since it is larger than the sum of its proper divisors (1522698486513).

28931271243367 is a wasteful number, since it uses less digits than its factorization.

28931271243367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522698486512.

The product of its digits is 18289152, while the sum is 58.

The spelling of 28931271243367 in words is "twenty-eight trillion, nine hundred thirty-one billion, two hundred seventy-one million, two hundred forty-three thousand, three hundred sixty-seven".