28140853 has 4 divisors (see below), whose sum is σ = 30305548. Its totient is φ = 25976160.

The previous prime is 28140829. The next prime is 28140863. The reversal of 28140853 is 35804182.

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 4695889 + 23444964 = 2167^2 + 4842^2 .

It is a cyclic number.

It is not a de Polignac number, because 28140853 - 2¹³ = 28132661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28140803) 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, 1082328 + ... + 1082353.

It is an arithmetic number, because the mean of its divisors is an integer number (7576387).

Almost surely, 2^28140853 is an apocalyptic number.

It is an amenable number.

28140853 is a deficient number, since it is larger than the sum of its proper divisors (2164695).

28140853 is a wasteful number, since it uses less digits than its factorization.

28140853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2164694.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28140853 is about 5304.7952835147. The cubic root of 28140853 is about 304.1672275046.

The spelling of 28140853 in words is "twenty-eight million, one hundred forty thousand, eight hundred fifty-three".