28661116 has 24 divisors (see below), whose sum is σ = 57936816. Its totient is φ = 12261120.

The previous prime is 28661107. The next prime is 28661123. The reversal of 28661116 is 61116682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18411 + ... + 19906.

It is an arithmetic number, because the mean of its divisors is an integer number (2414034).

Almost surely, 2^28661116 is an apocalyptic number.

It is an amenable number.

28661116 is an abundant number, since it is smaller than the sum of its proper divisors (29275700).

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

28661116 is a wasteful number, since it uses less digits than its factorization.

28661116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38349 (or 38347 counting only the distinct ones).

The product of its digits is 3456, while the sum is 31.

The square root of 28661116 is about 5353.6077555234. The cubic root of 28661116 is about 306.0302560255.

Adding to 28661116 its reverse (61116682), we get a palindrome (89777798).

The spelling of 28661116 in words is "twenty-eight million, six hundred sixty-one thousand, one hundred sixteen".