28329471 has 6 divisors (see below), whose sum is σ = 40920360. Its totient is φ = 18886308.

The previous prime is 28329461. The next prime is 28329481. The reversal of 28329471 is 17492382.

It is an interprime number because it is at equal distance from previous prime (28329461) and next prime (28329481).

It is not a de Polignac number, because 28329471 - 2¹⁵ = 28296703 is a prime.

It is a super-3 number, since 3×28329471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28329421) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1573851 + ... + 1573868.

It is an arithmetic number, because the mean of its divisors is an integer number (6820060).

Almost surely, 2^28329471 is an apocalyptic number.

28329471 is a deficient number, since it is larger than the sum of its proper divisors (12590889).

28329471 is a wasteful number, since it uses less digits than its factorization.

28329471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3147725 (or 3147722 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 28329471 is about 5322.5436588158. The cubic root of 28329471 is about 304.8452892692.

The spelling of 28329471 in words is "twenty-eight million, three hundred twenty-nine thousand, four hundred seventy-one".