28084161 has 16 divisors (see below), whose sum is σ = 43221888. Its totient is φ = 15888000.

The previous prime is 28084159. The next prime is 28084169. The reversal of 28084161 is 16148082.

It is not a de Polignac number, because 28084161 - 2¹ = 28084159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28084169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4500 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (2701368).

Almost surely, 2^28084161 is an apocalyptic number.

28084161 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28084161 is a deficient number, since it is larger than the sum of its proper divisors (15137727).

28084161 is a wasteful number, since it uses less digits than its factorization.

28084161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13352.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 28084161 is about 5299.4491223145. The cubic root of 28084161 is about 303.9628337816.

The spelling of 28084161 in words is "twenty-eight million, eighty-four thousand, one hundred sixty-one".