28211366 has 4 divisors (see below), whose sum is σ = 42317052. Its totient is φ = 14105682.

The previous prime is 28211303. The next prime is 28211377. The reversal of 28211366 is 66311282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66311282 = 2 ⋅33155641.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7052840 + ... + 7052843.

It is an arithmetic number, because the mean of its divisors is an integer number (10579263).

Almost surely, 2^28211366 is an apocalyptic number.

28211366 is a deficient number, since it is larger than the sum of its proper divisors (14105686).

28211366 is a wasteful number, since it uses less digits than its factorization.

28211366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14105685.

The product of its digits is 3456, while the sum is 29.

The square root of 28211366 is about 5311.4372819417. The cubic root of 28211366 is about 304.4210678866.

The spelling of 28211366 in words is "twenty-eight million, two hundred eleven thousand, three hundred sixty-six".