28293653 has 2 divisors, whose sum is σ = 28293654. Its totient is φ = 28293652.

The previous prime is 28293619. The next prime is 28293659. The reversal of 28293653 is 35639282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17783089 + 10510564 = 4217^2 + 3242^2 .

It is a cyclic number.

It is not a de Polignac number, because 28293653 - 2¹⁴ = 28277269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28293659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14146826 + 14146827.

It is an arithmetic number, because the mean of its divisors is an integer number (14146827).

Almost surely, 2^28293653 is an apocalyptic number.

It is an amenable number.

28293653 is a deficient number, since it is larger than the sum of its proper divisors (1).

28293653 is an equidigital number, since it uses as much as digits as its factorization.

28293653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 38.

The square root of 28293653 is about 5319.1778500065. The cubic root of 28293653 is about 304.7167593536.

The spelling of 28293653 in words is "twenty-eight million, two hundred ninety-three thousand, six hundred fifty-three".