28163247 has 16 divisors (see below), whose sum is σ = 44782080. Its totient is φ = 15393312.

The previous prime is 28163243. The next prime is 28163287. The reversal of 28163247 is 74236182.

It is not a de Polignac number, because 28163247 - 2² = 28163243 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28672 + ... + 29637.

It is an arithmetic number, because the mean of its divisors is an integer number (2798880).

Almost surely, 2^28163247 is an apocalyptic number.

28163247 is a deficient number, since it is larger than the sum of its proper divisors (16618833).

28163247 is a wasteful number, since it uses less digits than its factorization.

28163247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58342.

The product of its digits is 16128, while the sum is 33.

The square root of 28163247 is about 5306.9055955425. The cubic root of 28163247 is about 304.2478897701.

The spelling of 28163247 in words is "twenty-eight million, one hundred sixty-three thousand, two hundred forty-seven".