28018107 has 24 divisors (see below), whose sum is σ = 44033808. Its totient is φ = 17064000.

The previous prime is 28018099. The next prime is 28018121. The reversal of 28018107 is 70181082.

It is not a de Polignac number, because 28018107 - 2³ = 28018099 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28018187) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10632 + ... + 13002.

It is an arithmetic number, because the mean of its divisors is an integer number (1834742).

Almost surely, 2^28018107 is an apocalyptic number.

28018107 is a deficient number, since it is larger than the sum of its proper divisors (16015701).

28018107 is a wasteful number, since it uses less digits than its factorization.

28018107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491 (or 2488 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 28018107 is about 5293.2132962880. The cubic root of 28018107 is about 303.7243396501.

Adding to 28018107 its reverse (70181082), we get a palindrome (98199189).

The spelling of 28018107 in words is "twenty-eight million, eighteen thousand, one hundred seven".