28161074 has 4 divisors (see below), whose sum is σ = 42241614. Its totient is φ = 14080536.

The previous prime is 28161071. The next prime is 28161083. The reversal of 28161074 is 47016182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47016182 = 2 ⋅23508091.

It can be written as a sum of positive squares in only one way, i.e., 15960025 + 12201049 = 3995^2 + 3493^2 .

It is not an unprimeable number, because it can be changed into a prime (28161071) 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 as a sum of consecutive naturals, namely, 7040267 + ... + 7040270.

Almost surely, 2^28161074 is an apocalyptic number.

28161074 is a deficient number, since it is larger than the sum of its proper divisors (14080540).

28161074 is a wasteful number, since it uses less digits than its factorization.

28161074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080539.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 28161074 is about 5306.7008583488. The cubic root of 28161074 is about 304.2400645873.

The spelling of 28161074 in words is "twenty-eight million, one hundred sixty-one thousand, seventy-four".