28109454367 has 8 divisors (see below), whose sum is σ = 28400896512. Its totient is φ = 27818544600.

The previous prime is 28109454353. The next prime is 28109454403. The reversal of 28109454367 is 76345490182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28109454367 - 2⁷ = 28109454239 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28109454367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28109454337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26509 + ... + 238582.

It is an arithmetic number, because the mean of its divisors is an integer number (3550112064).

It is a 2-persistent number, because it is pandigital, and so is 2⋅28109454367 = 56218908734, but 3⋅28109454367 = 84328363101 is not.

Almost surely, 2^28109454367 is an apocalyptic number.

28109454367 is the 106037-th heptagonal number.

28109454367 is a deficient number, since it is larger than the sum of its proper divisors (291442145).

28109454367 is a wasteful number, since it uses less digits than its factorization.

28109454367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266189.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 28109454367 in words is "twenty-eight billion, one hundred nine million, four hundred fifty-four thousand, three hundred sixty-seven".