28981114 has 4 divisors (see below), whose sum is σ = 43471674. Its totient is φ = 14490556.

The previous prime is 28981111. The next prime is 28981129. The reversal of 28981114 is 41118982.

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., 28440889 + 540225 = 5333^2 + 735^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28981114.

It is not an unprimeable number, because it can be changed into a prime (28981111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7245277 + ... + 7245280.

Almost surely, 2^28981114 is an apocalyptic number.

28981114 is a deficient number, since it is larger than the sum of its proper divisors (14490560).

28981114 is a wasteful number, since it uses less digits than its factorization.

28981114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490559.

The product of its digits is 4608, while the sum is 34.

The square root of 28981114 is about 5383.4110004717. The cubic root of 28981114 is about 307.1649740905.

The spelling of 28981114 in words is "twenty-eight million, nine hundred eighty-one thousand, one hundred fourteen".