28067161 has 4 divisors (see below), whose sum is σ = 29544400. Its totient is φ = 26589924.

The previous prime is 28067141. The next prime is 28067177. The reversal of 28067161 is 16176082.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28067161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28067111) 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, 738591 + ... + 738628.

It is an arithmetic number, because the mean of its divisors is an integer number (7386100).

Almost surely, 2^28067161 is an apocalyptic number.

It is an amenable number.

28067161 is a deficient number, since it is larger than the sum of its proper divisors (1477239).

28067161 is a wasteful number, since it uses less digits than its factorization.

28067161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1477238.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 28067161 is about 5297.8449392182. The cubic root of 28067161 is about 303.9014894629.

The spelling of 28067161 in words is "twenty-eight million, sixty-seven thousand, one hundred sixty-one".