28398647875247 has 8 divisors (see below), whose sum is σ = 30627418535280. Its totient is φ = 26176199970240.

The previous prime is 28398647875243. The next prime is 28398647875271. The reversal of 28398647875247 is 74257874689382.

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 28398647875247 - 2² = 28398647875243 is a prime.

It is a super-3 number, since 3×28398647875247³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28398647875243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1580679422 + ... + 1580697387.

It is an arithmetic number, because the mean of its divisors is an integer number (3828427316910).

Almost surely, 2^{28398647875247} is an apocalyptic number.

28398647875247 is a deficient number, since it is larger than the sum of its proper divisors (2228770660033).

28398647875247 is a wasteful number, since it uses less digits than its factorization.

28398647875247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3161377513.

The product of its digits is 9103933440, while the sum is 80.

The spelling of 28398647875247 in words is "twenty-eight trillion, three hundred ninety-eight billion, six hundred forty-seven million, eight hundred seventy-five thousand, two hundred forty-seven".