28252107 has 48 divisors (see below), whose sum is σ = 47174400. Its totient is φ = 16148160.

The previous prime is 28252057. The next prime is 28252117. The reversal of 28252107 is 70125282.

It is not a de Polignac number, because 28252107 - 2⁶ = 28252043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28252117) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 157744 + ... + 157922.

It is an arithmetic number, because the mean of its divisors is an integer number (982800).

Almost surely, 2^28252107 is an apocalyptic number.

28252107 is a deficient number, since it is larger than the sum of its proper divisors (18922293).

28252107 is a wasteful number, since it uses less digits than its factorization.

28252107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288 (or 285 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 28252107 is about 5315.2711125586. The cubic root of 28252107 is about 304.5675390318.

Adding to 28252107 its reverse (70125282), we get a palindrome (98377389).

The spelling of 28252107 in words is "twenty-eight million, two hundred fifty-two thousand, one hundred seven".