28955161 has 3 divisors (see below), whose sum is σ = 28960543. Its totient is φ = 28949780.

The previous prime is 28955141. The next prime is 28955167. The reversal of 28955161 is 16155982.

The square root of 28955161 is 5381.

It is a perfect power (a square), and thus also a powerful 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.

It can be written as a sum of positive squares in only one way, i.e., 9418761 + 19536400 = 3069^2 + 4420^2 .

It is not a de Polignac number, because 28955161 - 2⁹ = 28954649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28955161.

It is not an unprimeable number, because it can be changed into a prime (28955167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2691 + ... + 8071.

Almost surely, 2^28955161 is an apocalyptic number.

28955161 is the 5381-st square number.

28955161 is the 2691-st centered octagonal number.

It is an amenable number.

28955161 is a deficient number, since it is larger than the sum of its proper divisors (5382).

28955161 is an frugal number, since it uses more digits than its factorization.

28955161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10762 (or 5381 counting only the distinct ones).

The product of its digits is 21600, while the sum is 37.

The cubic root of 28955161 is about 307.0732565051.

The spelling of 28955161 in words is "twenty-eight million, nine hundred fifty-five thousand, one hundred sixty-one".