28436194 has 4 divisors (see below), whose sum is σ = 42654294. Its totient is φ = 14218096.

The previous prime is 28436173. The next prime is 28436209. The reversal of 28436194 is 49163482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49163482 = 2 ⋅24581741.

It can be written as a sum of positive squares in only one way, i.e., 27426169 + 1010025 = 5237^2 + 1005^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7109047 + ... + 7109050.

Almost surely, 2^28436194 is an apocalyptic number.

28436194 is a deficient number, since it is larger than the sum of its proper divisors (14218100).

28436194 is a wasteful number, since it uses less digits than its factorization.

28436194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14218099.

The product of its digits is 41472, while the sum is 37.

The square root of 28436194 is about 5332.5597980707. The cubic root of 28436194 is about 305.2276147396.

The spelling of 28436194 in words is "twenty-eight million, four hundred thirty-six thousand, one hundred ninety-four".