28516293 has 64 divisors (see below), whose sum is σ = 49593600. Its totient is φ = 16236288.

The previous prime is 28516291. The next prime is 28516303. The reversal of 28516293 is 39261582.

28516293 is a `hidden beast` number, since 28 + 5 + 1 + 629 + 3 = 666.

It is not a de Polignac number, because 28516293 - 2¹ = 28516291 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28516291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 483298 + ... + 483356.

It is an arithmetic number, because the mean of its divisors is an integer number (774900).

Almost surely, 2^28516293 is an apocalyptic number.

It is an amenable number.

28516293 is a deficient number, since it is larger than the sum of its proper divisors (21077307).

28516293 is an equidigital number, since it uses as much as digits as its factorization.

28516293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 92 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28516293 is about 5340.0648872462. The cubic root of 28516293 is about 305.5139341998.

The spelling of 28516293 in words is "twenty-eight million, five hundred sixteen thousand, two hundred ninety-three".