28652481 has 64 divisors (see below), whose sum is σ = 51367680. Its totient is φ = 15552000.

The previous prime is 28652473. The next prime is 28652527. The reversal of 28652481 is 18425682.

It is not a de Polignac number, because 28652481 - 2³ = 28652473 is a prime.

It is a super-2 number, since 2×28652481² = 1641929334910722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28652441) 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 63 ways as a sum of consecutive naturals, for example, 158211 + ... + 158391.

It is an arithmetic number, because the mean of its divisors is an integer number (802620).

Almost surely, 2^28652481 is an apocalyptic number.

It is an amenable number.

28652481 is a deficient number, since it is larger than the sum of its proper divisors (22715199).

28652481 is a wasteful number, since it uses less digits than its factorization.

28652481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 249 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 28652481 is about 5352.8012292630. The cubic root of 28652481 is about 305.9995194149. Note that the first 3 decimals are identical.

The spelling of 28652481 in words is "twenty-eight million, six hundred fifty-two thousand, four hundred eighty-one".