28805471 has 2 divisors, whose sum is σ = 28805472. Its totient is φ = 28805470.

The previous prime is 28805467. The next prime is 28805489. The reversal of 28805471 is 17450882.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28805471 - 2² = 28805467 is a prime.

It is a super-3 number, since 3×28805471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28805401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14402735 + 14402736.

It is an arithmetic number, because the mean of its divisors is an integer number (14402736).

Almost surely, 2^28805471 is an apocalyptic number.

28805471 is a deficient number, since it is larger than the sum of its proper divisors (1).

28805471 is an equidigital number, since it uses as much as digits as its factorization.

28805471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28805471 is about 5367.0728521234. The cubic root of 28805471 is about 306.5431813531.

The spelling of 28805471 in words is "twenty-eight million, eight hundred five thousand, four hundred seventy-one".