28211337 has 24 divisors (see below), whose sum is σ = 50806080. Its totient is φ = 14654880.

The previous prime is 28211303. The next prime is 28211377. The reversal of 28211337 is 73311282.

It is not a de Polignac number, because 28211337 - 2⁸ = 28211081 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28211337.

It is not an unprimeable number, because it can be changed into a prime (28211377) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 19662 + ... + 21047.

It is an arithmetic number, because the mean of its divisors is an integer number (2116920).

Almost surely, 2^28211337 is an apocalyptic number.

It is an amenable number.

28211337 is a deficient number, since it is larger than the sum of its proper divisors (22594743).

28211337 is a wasteful number, since it uses less digits than its factorization.

28211337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40733 (or 40730 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 28211337 is about 5311.4345519831. The cubic root of 28211337 is about 304.4209635762.

The spelling of 28211337 in words is "twenty-eight million, two hundred eleven thousand, three hundred thirty-seven".