28714786 has 4 divisors (see below), whose sum is σ = 43072182. Its totient is φ = 14357392.

The previous prime is 28714783. The next prime is 28714831. The reversal of 28714786 is 68741782.

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., 21855625 + 6859161 = 4675^2 + 2619^2 .

It is not an unprimeable number, because it can be changed into a prime (28714783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7178695 + ... + 7178698.

Almost surely, 2^28714786 is an apocalyptic number.

28714786 is a deficient number, since it is larger than the sum of its proper divisors (14357396).

28714786 is a wasteful number, since it uses less digits than its factorization.

28714786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14357395.

The product of its digits is 150528, while the sum is 43.

The square root of 28714786 is about 5358.6179188294. The cubic root of 28714786 is about 306.2211581335.

The spelling of 28714786 in words is "twenty-eight million, seven hundred fourteen thousand, seven hundred eighty-six".