28942161 has 8 divisors (see below), whose sum is σ = 38691840. Its totient is φ = 19243632.

The previous prime is 28942159. The next prime is 28942169. The reversal of 28942161 is 16124982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28942161 - 2¹ = 28942159 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28942169) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11446 + ... + 13743.

It is an arithmetic number, because the mean of its divisors is an integer number (4836480).

Almost surely, 2^28942161 is an apocalyptic number.

It is an amenable number.

28942161 is a deficient number, since it is larger than the sum of its proper divisors (9749679).

28942161 is a wasteful number, since it uses less digits than its factorization.

28942161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25575.

The product of its digits is 6912, while the sum is 33.

The square root of 28942161 is about 5379.7919104739. The cubic root of 28942161 is about 307.0272940610.

The spelling of 28942161 in words is "twenty-eight million, nine hundred forty-two thousand, one hundred sixty-one".