28163679 has 16 divisors (see below), whose sum is σ = 40733280. Its totient is φ = 17239040.

The previous prime is 28163677. The next prime is 28163687. The reversal of 28163679 is 97636182.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28163679 - 2¹ = 28163677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28163679.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28163671) 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, 4644 + ... + 8825.

It is an arithmetic number, because the mean of its divisors is an integer number (2545830).

Almost surely, 2^28163679 is an apocalyptic number.

28163679 is a deficient number, since it is larger than the sum of its proper divisors (12569601).

28163679 is a wasteful number, since it uses less digits than its factorization.

28163679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13530.

The product of its digits is 108864, while the sum is 42.

The square root of 28163679 is about 5306.9462970714. The cubic root of 28163679 is about 304.2494453958.

The spelling of 28163679 in words is "twenty-eight million, one hundred sixty-three thousand, six hundred seventy-nine".