28281353 has 4 divisors (see below), whose sum is σ = 29944980. Its totient is φ = 26617728.

The previous prime is 28281343. The next prime is 28281371. The reversal of 28281353 is 35318282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20866624 + 7414729 = 4568^2 + 2723^2 .

It is a cyclic number.

It is not a de Polignac number, because 28281353 - 2¹² = 28277257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28281343) 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, 831788 + ... + 831821.

It is an arithmetic number, because the mean of its divisors is an integer number (7486245).

Almost surely, 2^28281353 is an apocalyptic number.

It is an amenable number.

28281353 is a deficient number, since it is larger than the sum of its proper divisors (1663627).

28281353 is a wasteful number, since it uses less digits than its factorization.

28281353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1663626.

The product of its digits is 11520, while the sum is 32.

The square root of 28281353 is about 5318.0215306070. The cubic root of 28281353 is about 304.6725968060.

The spelling of 28281353 in words is "twenty-eight million, two hundred eighty-one thousand, three hundred fifty-three".