28648071 has 6 divisors (see below), whose sum is σ = 41380560. Its totient is φ = 19098708.

The previous prime is 28648069. The next prime is 28648091. The reversal of 28648071 is 17084682.

28648071 is a `hidden beast` number, since 2 + 8 + 648 + 0 + 7 + 1 = 666.

It is not a de Polignac number, because 28648071 - 2¹ = 28648069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28648001) 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, 1591551 + ... + 1591568.

It is an arithmetic number, because the mean of its divisors is an integer number (6896760).

Almost surely, 2^28648071 is an apocalyptic number.

28648071 is a deficient number, since it is larger than the sum of its proper divisors (12732489).

28648071 is a wasteful number, since it uses less digits than its factorization.

28648071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3183125 (or 3183122 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 28648071 is about 5352.3892795648. The cubic root of 28648071 is about 305.9838194699.

The spelling of 28648071 in words is "twenty-eight million, six hundred forty-eight thousand, seventy-one".