28631116 has 12 divisors (see below), whose sum is σ = 50591632. Its totient is φ = 14176368.

The previous prime is 28631093. The next prime is 28631117. The reversal of 28631116 is 61113682.

It is not an unprimeable number, because it can be changed into a prime (28631117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34335 + ... + 35158.

Almost surely, 2^28631116 is an apocalyptic number.

It is an amenable number.

28631116 is a deficient number, since it is larger than the sum of its proper divisors (21960516).

28631116 is a wasteful number, since it uses less digits than its factorization.

28631116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69600 (or 69598 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 28631116 is about 5350.8051730557. The cubic root of 28631116 is about 305.9234433342.

Adding to 28631116 its reverse (61113682), we get a palindrome (89744798).

The spelling of 28631116 in words is "twenty-eight million, six hundred thirty-one thousand, one hundred sixteen".