28447666471 has 8 divisors (see below), whose sum is σ = 32513264000. Its totient is φ = 24382480248.

The previous prime is 28447666463. The next prime is 28447666517. The reversal of 28447666471 is 17466674482.

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

It is not a de Polignac number, because 28447666471 - 2³ = 28447666463 is a prime.

It is a super-3 number, since 3×28447666471³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28447666421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63280 + ... + 246778.

It is an arithmetic number, because the mean of its divisors is an integer number (4064158000).

Almost surely, 2^28447666471 is an apocalyptic number.

28447666471 is a deficient number, since it is larger than the sum of its proper divisors (4065597529).

28447666471 is a wasteful number, since it uses less digits than its factorization.

28447666471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205653.

The product of its digits is 10838016, while the sum is 55.

The spelling of 28447666471 in words is "twenty-eight billion, four hundred forty-seven million, six hundred sixty-six thousand, four hundred seventy-one".