28266418 has 4 divisors (see below), whose sum is σ = 42399630. Its totient is φ = 14133208.

The previous prime is 28266401. The next prime is 28266421. The reversal of 28266418 is 81466282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 17749369 + 10517049 = 4213^2 + 3243^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7066603 + ... + 7066606.

Almost surely, 2^28266418 is an apocalyptic number.

28266418 is a deficient number, since it is larger than the sum of its proper divisors (14133212).

28266418 is a wasteful number, since it uses less digits than its factorization.

28266418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133211.

The product of its digits is 36864, while the sum is 37.

The square root of 28266418 is about 5316.6171575542. The cubic root of 28266418 is about 304.6189562034.

The spelling of 28266418 in words is "twenty-eight million, two hundred sixty-six thousand, four hundred eighteen".