28718026 has 4 divisors (see below), whose sum is σ = 43077042. Its totient is φ = 14359012.

The previous prime is 28718021. The next prime is 28718029. The reversal of 28718026 is 62081782.

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., 26471025 + 2247001 = 5145^2 + 1499^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28717982 and 28718000.

It is not an unprimeable number, because it can be changed into a prime (28718021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7179505 + ... + 7179508.

Almost surely, 2^28718026 is an apocalyptic number.

28718026 is a deficient number, since it is larger than the sum of its proper divisors (14359016).

28718026 is a wasteful number, since it uses less digits than its factorization.

28718026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14359015.

The product of its (nonzero) digits is 10752, while the sum is 34.

The square root of 28718026 is about 5358.9202270607. The cubic root of 28718026 is about 306.2326750716.

The spelling of 28718026 in words is "twenty-eight million, seven hundred eighteen thousand, twenty-six".