28652571 has 12 divisors (see below), whose sum is σ = 41853240. Its totient is φ = 18886560.

The previous prime is 28652557. The next prime is 28652579. The reversal of 28652571 is 17525682.

It is a happy number.

28652571 is a `hidden beast` number, since 2 + 86 + 5 + 2 + 571 = 666.

It is not a de Polignac number, because 28652571 - 2⁷ = 28652443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28652579) 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 11 ways as a sum of consecutive naturals, for example, 17085 + ... + 18686.

It is an arithmetic number, because the mean of its divisors is an integer number (3487770).

Almost surely, 2^28652571 is an apocalyptic number.

28652571 is a deficient number, since it is larger than the sum of its proper divisors (13200669).

28652571 is a wasteful number, since it uses less digits than its factorization.

28652571 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35866 (or 35863 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 28652571 is about 5352.8096360696. The cubic root of 28652571 is about 305.9998398051. Note that the first 3 decimals are identical.

The spelling of 28652571 in words is "twenty-eight million, six hundred fifty-two thousand, five hundred seventy-one".