28211114 has 4 divisors (see below), whose sum is σ = 42316674. Its totient is φ = 14105556.

The previous prime is 28211101. The next prime is 28211123. The reversal of 28211114 is 41111282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41111282 = 2 ⋅20555641.

It can be written as a sum of positive squares in only one way, i.e., 25755625 + 2455489 = 5075^2 + 1567^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7052777 + ... + 7052780.

Almost surely, 2^28211114 is an apocalyptic number.

28211114 is a deficient number, since it is larger than the sum of its proper divisors (14105560).

28211114 is a wasteful number, since it uses less digits than its factorization.

28211114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105559.

The product of its digits is 128, while the sum is 20.

The square root of 28211114 is about 5311.4135594962. The cubic root of 28211114 is about 304.4201614631.

Adding to 28211114 its reverse (41111282), we get a palindrome (69322396).

The spelling of 28211114 in words is "twenty-eight million, two hundred eleven thousand, one hundred fourteen".