28007471 has 2 divisors, whose sum is σ = 28007472. Its totient is φ = 28007470.

The previous prime is 28007461. The next prime is 28007503. The reversal of 28007471 is 17470082.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28007471 - 2¹⁴ = 27991087 is a prime.

It is a super-3 number, since 3×28007471³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28007431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14003735 + 14003736.

It is an arithmetic number, because the mean of its divisors is an integer number (14003736).

Almost surely, 2^28007471 is an apocalyptic number.

28007471 is a deficient number, since it is larger than the sum of its proper divisors (1).

28007471 is an equidigital number, since it uses as much as digits as its factorization.

28007471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 28007471 is about 5292.2085181897. The cubic root of 28007471 is about 303.6859023528.

The spelling of 28007471 in words is "twenty-eight million, seven thousand, four hundred seventy-one".