28432113 has 16 divisors (see below), whose sum is σ = 40457280. Its totient is φ = 17708544.

The previous prime is 28432099. The next prime is 28432121. The reversal of 28432113 is 31123482.

It is not a de Polignac number, because 28432113 - 2⁴ = 28432097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28432123) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 745 + ... + 7577.

It is an arithmetic number, because the mean of its divisors is an integer number (2528580).

Almost surely, 2^28432113 is an apocalyptic number.

It is an amenable number.

28432113 is a deficient number, since it is larger than the sum of its proper divisors (12025167).

28432113 is a wasteful number, since it uses less digits than its factorization.

28432113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6928.

The product of its digits is 1152, while the sum is 24.

The square root of 28432113 is about 5332.1771350922. The cubic root of 28432113 is about 305.2130125336.

Adding to 28432113 its reverse (31123482), we get a palindrome (59555595).

The spelling of 28432113 in words is "twenty-eight million, four hundred thirty-two thousand, one hundred thirteen".