28275161 has 4 divisors (see below), whose sum is σ = 28285824. Its totient is φ = 28264500.

The previous prime is 28275157. The next prime is 28275167. The reversal of 28275161 is 16157282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28275161 - 2² = 28275157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28275167) 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, 2096 + ... + 7806.

It is an arithmetic number, because the mean of its divisors is an integer number (7071456).

Almost surely, 2^28275161 is an apocalyptic number.

It is an amenable number.

28275161 is a deficient number, since it is larger than the sum of its proper divisors (10663).

28275161 is an equidigital number, since it uses as much as digits as its factorization.

28275161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10662.

The product of its digits is 6720, while the sum is 32.

The square root of 28275161 is about 5317.4393273454. The cubic root of 28275161 is about 304.6503598876.

The spelling of 28275161 in words is "twenty-eight million, two hundred seventy-five thousand, one hundred sixty-one".