28642068247 has 8 divisors (see below), whose sum is σ = 30855590640. Its totient is φ = 26430015360.

The previous prime is 28642068223. The next prime is 28642068277. The reversal of 28642068247 is 74286024682.

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 a de Polignac number, because none of the positive numbers 2^k-28642068247 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 28642068247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28642068277) 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, 326722 + ... + 405007.

It is an arithmetic number, because the mean of its divisors is an integer number (3856948830).

Almost surely, 2^28642068247 is an apocalyptic number.

28642068247 is a deficient number, since it is larger than the sum of its proper divisors (2213522393).

28642068247 is a wasteful number, since it uses less digits than its factorization.

28642068247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 734753.

The product of its (nonzero) digits is 2064384, while the sum is 49.

The spelling of 28642068247 in words is "twenty-eight billion, six hundred forty-two million, sixty-eight thousand, two hundred forty-seven".