28943253 has 12 divisors (see below), whose sum is σ = 42827148. Its totient is φ = 18824640.

The previous prime is 28943249. The next prime is 28943273. The reversal of 28943253 is 35234982.

It can be written as a sum of positive squares in 2 ways, for example, as 3359889 + 25583364 = 1833^2 + 5058^2 .

It is not a de Polignac number, because 28943253 - 2² = 28943249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38850 + ... + 39587.

It is an arithmetic number, because the mean of its divisors is an integer number (3568929).

Almost surely, 2^28943253 is an apocalyptic number.

It is an amenable number.

28943253 is a deficient number, since it is larger than the sum of its proper divisors (13883895).

28943253 is a wasteful number, since it uses less digits than its factorization.

28943253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78484 (or 78481 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 28943253 is about 5379.8934004309. The cubic root of 28943253 is about 307.0311554357.

The spelling of 28943253 in words is "twenty-eight million, nine hundred forty-three thousand, two hundred fifty-three".