28211882 has 4 divisors (see below), whose sum is σ = 42317826. Its totient is φ = 14105940.

The previous prime is 28211879. The next prime is 28211893. The reversal of 28211882 is 28811282.

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., 17901361 + 10310521 = 4231^2 + 3211^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7052969 + ... + 7052972.

Almost surely, 2^28211882 is an apocalyptic number.

28211882 is a deficient number, since it is larger than the sum of its proper divisors (14105944).

28211882 is a wasteful number, since it uses less digits than its factorization.

28211882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14105943.

The product of its digits is 4096, while the sum is 32.

The square root of 28211882 is about 5311.4858561423. The cubic root of 28211882 is about 304.4229238798.

The spelling of 28211882 in words is "twenty-eight million, two hundred eleven thousand, eight hundred eighty-two".