28169447471 has 12 divisors (see below), whose sum is σ = 31206932736. Its totient is φ = 25406932320.

The previous prime is 28169447459. The next prime is 28169447473. The reversal of 28169447471 is 17474496182.

It is not a de Polignac number, because 28169447471 - 2⁶ = 28169447407 is a prime.

It is a super-3 number, since 3×28169447471³ (a number of 32 digits) contains 333 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 (28169447473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 901190 + ... + 931923.

It is an arithmetic number, because the mean of its divisors is an integer number (2600577728).

Almost surely, 2^28169447471 is an apocalyptic number.

28169447471 is a deficient number, since it is larger than the sum of its proper divisors (3037485265).

28169447471 is a wasteful number, since it uses less digits than its factorization.

28169447471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833262 (or 1833251 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 53.

The spelling of 28169447471 in words is "twenty-eight billion, one hundred sixty-nine million, four hundred forty-seven thousand, four hundred seventy-one".