28043471 has 2 divisors, whose sum is σ = 28043472. Its totient is φ = 28043470.

The previous prime is 28043441. The next prime is 28043507. The reversal of 28043471 is 17434082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28043471 - 2¹⁰ = 28042447 is a prime.

It is a super-3 number, since 3×28043471³ (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 (28043401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14021735 + 14021736.

It is an arithmetic number, because the mean of its divisors is an integer number (14021736).

Almost surely, 2^28043471 is an apocalyptic number.

28043471 is a deficient number, since it is larger than the sum of its proper divisors (1).

28043471 is an equidigital number, since it uses as much as digits as its factorization.

28043471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 28043471 is about 5295.6086524591. The cubic root of 28043471 is about 303.8159630264.

The spelling of 28043471 in words is "twenty-eight million, forty-three thousand, four hundred seventy-one".