28332471 has 8 divisors (see below), whose sum is σ = 37808640. Its totient is φ = 18872312.

The previous prime is 28332463. The next prime is 28332511. The reversal of 28332471 is 17423382.

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 28332471 - 2³ = 28332463 is a prime.

It is a super-3 number, since 3×28332471³ (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 (28332461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1036 + ... + 7598.

It is an arithmetic number, because the mean of its divisors is an integer number (4726080).

Almost surely, 2^28332471 is an apocalyptic number.

28332471 is a deficient number, since it is larger than the sum of its proper divisors (9476169).

28332471 is a wasteful number, since it uses less digits than its factorization.

28332471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8005.

The product of its digits is 8064, while the sum is 30.

The square root of 28332471 is about 5322.8254714954. The cubic root of 28332471 is about 304.8560496018.

The spelling of 28332471 in words is "twenty-eight million, three hundred thirty-two thousand, four hundred seventy-one".