28551116 has 12 divisors (see below), whose sum is σ = 54506760. Its totient is φ = 12977760.

The previous prime is 28551101. The next prime is 28551139. The reversal of 28551116 is 61115582.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 324401 + ... + 324488.

It is an arithmetic number, because the mean of its divisors is an integer number (4542230).

Almost surely, 2^28551116 is an apocalyptic number.

It is an amenable number.

28551116 is a deficient number, since it is larger than the sum of its proper divisors (25955644).

28551116 is a wasteful number, since it uses less digits than its factorization.

28551116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648904 (or 648902 counting only the distinct ones).

The product of its digits is 2400, while the sum is 29.

The square root of 28551116 is about 5343.3244333467. The cubic root of 28551116 is about 305.6382442338.

Adding to 28551116 its reverse (61115582), we get a palindrome (89666698).

The spelling of 28551116 in words is "twenty-eight million, five hundred fifty-one thousand, one hundred sixteen".