28117612 has 6 divisors (see below), whose sum is σ = 49205828. Its totient is φ = 14058804.

The previous prime is 28117597. The next prime is 28117619. The reversal of 28117612 is 21671182.

It is not an unprimeable number, because it can be changed into a prime (28117619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3514698 + ... + 3514705.

Almost surely, 2^28117612 is an apocalyptic number.

It is an amenable number.

28117612 is a deficient number, since it is larger than the sum of its proper divisors (21088216).

28117612 is a wasteful number, since it uses less digits than its factorization.

28117612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7029407 (or 7029405 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 28117612 is about 5302.6042658301. The cubic root of 28117612 is about 304.0834691158.

Adding to 28117612 its reverse (21671182), we get a palindrome (49788794).

The spelling of 28117612 in words is "twenty-eight million, one hundred seventeen thousand, six hundred twelve".