28213334 has 4 divisors (see below), whose sum is σ = 42320004. Its totient is φ = 14106666.

The previous prime is 28213327. The next prime is 28213337. The reversal of 28213334 is 43331282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43331282 = 2 ⋅21665641.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28213337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7053332 + ... + 7053335.

It is an arithmetic number, because the mean of its divisors is an integer number (10580001).

Almost surely, 2^28213334 is an apocalyptic number.

28213334 is a deficient number, since it is larger than the sum of its proper divisors (14106670).

28213334 is a wasteful number, since it uses less digits than its factorization.

28213334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14106669.

The product of its digits is 3456, while the sum is 26.

The square root of 28213334 is about 5311.6225393000. The cubic root of 28213334 is about 304.4281464370.

The spelling of 28213334 in words is "twenty-eight million, two hundred thirteen thousand, three hundred thirty-four".