28653161 has 4 divisors (see below), whose sum is σ = 28665300. Its totient is φ = 28641024.

The previous prime is 28653151. The next prime is 28653169. The reversal of 28653161 is 16135682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16135682 = 2 ⋅8067841.

It can be written as a sum of positive squares in 2 ways, for example, as 7123561 + 21529600 = 2669^2 + 4640^2 .

It is a cyclic number.

It is not a de Polignac number, because 28653161 - 2¹⁸ = 28391017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28653169) 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, 1256 + ... + 7673.

It is an arithmetic number, because the mean of its divisors is an integer number (7166325).

Almost surely, 2^28653161 is an apocalyptic number.

It is an amenable number.

28653161 is a deficient number, since it is larger than the sum of its proper divisors (12139).

28653161 is an equidigital number, since it uses as much as digits as its factorization.

28653161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12138.

The product of its digits is 8640, while the sum is 32.

The square root of 28653161 is about 5352.8647470303. The cubic root of 28653161 is about 306.0019401247.

The spelling of 28653161 in words is "twenty-eight million, six hundred fifty-three thousand, one hundred sixty-one".