28753647 has 32 divisors (see below), whose sum is σ = 45158400. Its totient is φ = 16104960.

The previous prime is 28753619. The next prime is 28753661. The reversal of 28753647 is 74635782.

It is not a de Polignac number, because 28753647 - 2¹⁶ = 28688111 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28753599 and 28753608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28753447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19854 + ... + 21252.

It is an arithmetic number, because the mean of its divisors is an integer number (1411200).

Almost surely, 2^28753647 is an apocalyptic number.

28753647 is a deficient number, since it is larger than the sum of its proper divisors (16404753).

28753647 is a wasteful number, since it uses less digits than its factorization.

28753647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463.

The product of its digits is 282240, while the sum is 42.

The square root of 28753647 is about 5362.2427211009. The cubic root of 28753647 is about 306.3592367778.

The spelling of 28753647 in words is "twenty-eight million, seven hundred fifty-three thousand, six hundred forty-seven".