28394816671 has 8 divisors (see below), whose sum is σ = 30586447584. Its totient is φ = 26204244960.

The previous prime is 28394816663. The next prime is 28394816707. The reversal of 28394816671 is 17661849382.

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 28394816671 - 2³ = 28394816663 is a prime.

It is a super-2 number, since 2×28394816671² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28394816771) 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, 208675 + ... + 316756.

It is an arithmetic number, because the mean of its divisors is an integer number (3823305948).

Almost surely, 2^28394816671 is an apocalyptic number.

28394816671 is a deficient number, since it is larger than the sum of its proper divisors (2191630913).

28394816671 is a wasteful number, since it uses less digits than its factorization.

28394816671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529601.

The product of its digits is 3483648, while the sum is 55.

The spelling of 28394816671 in words is "twenty-eight billion, three hundred ninety-four million, eight hundred sixteen thousand, six hundred seventy-one".