28240053 has 4 divisors (see below), whose sum is σ = 37653408. Its totient is φ = 18826700.

The previous prime is 28240049. The next prime is 28240057. The reversal of 28240053 is 35004282.

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 an interprime number because it is at equal distance from previous prime (28240049) and next prime (28240057).

It is a cyclic number.

It is not a de Polignac number, because 28240053 - 2² = 28240049 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28240057) 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, 4706673 + ... + 4706678.

It is an arithmetic number, because the mean of its divisors is an integer number (9413352).

Almost surely, 2^28240053 is an apocalyptic number.

It is an amenable number.

28240053 is a deficient number, since it is larger than the sum of its proper divisors (9413355).

28240053 is an equidigital number, since it uses as much as digits as its factorization.

28240053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9413354.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 28240053 is about 5314.1370889355. The cubic root of 28240053 is about 304.5242174327.

The spelling of 28240053 in words is "twenty-eight million, two hundred forty thousand, fifty-three".