28743853 has 4 divisors (see below), whose sum is σ = 29148768. Its totient is φ = 28338940.

The previous prime is 28743817. The next prime is 28743877. The reversal of 28743853 is 35834782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-28743853 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28743653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 202351 + ... + 202492.

It is an arithmetic number, because the mean of its divisors is an integer number (7287192).

Almost surely, 2^28743853 is an apocalyptic number.

It is an amenable number.

28743853 is a deficient number, since it is larger than the sum of its proper divisors (404915).

28743853 is an equidigital number, since it uses as much as digits as its factorization.

28743853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404914.

The product of its digits is 161280, while the sum is 40.

The square root of 28743853 is about 5361.3294060335. The cubic root of 28743853 is about 306.3244490387.

The spelling of 28743853 in words is "twenty-eight million, seven hundred forty-three thousand, eight hundred fifty-three".