28646212071 has 8 divisors (see below), whose sum is σ = 38198103664. Its totient is φ = 19095897600.

The previous prime is 28646212061. The next prime is 28646212079. The reversal of 28646212071 is 17021264682.

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

It is a de Polignac number, because none of the positive numbers 2^k-28646212071 is a prime.

It is a super-2 number, since 2×28646212071² (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 (28646212079) 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, 351226 + ... + 425031.

It is an arithmetic number, because the mean of its divisors is an integer number (4774762958).

Almost surely, 2^28646212071 is an apocalyptic number.

28646212071 is a deficient number, since it is larger than the sum of its proper divisors (9551891593).

28646212071 is a wasteful number, since it uses less digits than its factorization.

28646212071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788561.

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 28646212071 in words is "twenty-eight billion, six hundred forty-six million, two hundred twelve thousand, seventy-one".