28211348 has 12 divisors (see below), whose sum is σ = 53858112. Its totient is φ = 12823320.

The previous prime is 28211303. The next prime is 28211377. The reversal of 28211348 is 84311282.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28211348.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320540 + ... + 320627.

It is an arithmetic number, because the mean of its divisors is an integer number (4488176).

Almost surely, 2^28211348 is an apocalyptic number.

It is an amenable number.

28211348 is a deficient number, since it is larger than the sum of its proper divisors (25646764).

28211348 is a wasteful number, since it uses less digits than its factorization.

28211348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641182 (or 641180 counting only the distinct ones).

The product of its digits is 3072, while the sum is 29.

The square root of 28211348 is about 5311.4355874848. The cubic root of 28211348 is about 304.4210031422.

The spelling of 28211348 in words is "twenty-eight million, two hundred eleven thousand, three hundred forty-eight".