28571116 has 18 divisors (see below), whose sum is σ = 58163028. Its totient is φ = 12244680.

The previous prime is 28571113. The next prime is 28571131. The reversal of 28571116 is 61117582.

It is not an unprimeable number, because it can be changed into a prime (28571113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72690 + ... + 73081.

Almost surely, 2^28571116 is an apocalyptic number.

It is an amenable number.

28571116 is an abundant number, since it is smaller than the sum of its proper divisors (29591912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28571116 is a wasteful number, since it uses less digits than its factorization.

28571116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145789 (or 145780 counting only the distinct ones).

The product of its digits is 3360, while the sum is 31.

The square root of 28571116 is about 5345.1955997887. The cubic root of 28571116 is about 305.7095939038.

Adding to 28571116 its reverse (61117582), we get a palindrome (89688698).

The spelling of 28571116 in words is "twenty-eight million, five hundred seventy-one thousand, one hundred sixteen".