28143026 has 8 divisors (see below), whose sum is σ = 42429420. Its totient is φ = 13999888.

The previous prime is 28143013. The next prime is 28143061. The reversal of 28143026 is 62034182.

It is a Cunningham number, because it is equal to 5305²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 28143025 + 1 = 5305^2 + 1^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28142986 and 28143004.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35321 + ... + 36108.

Almost surely, 2^28143026 is an apocalyptic number.

28143026 is a deficient number, since it is larger than the sum of its proper divisors (14286394).

28143026 is a wasteful number, since it uses less digits than its factorization.

28143026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71628.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 28143026 is about 5305.0000942507. Note that the first 4 decimals coincide. The cubic root of 28143026 is about 304.1750564355.

The spelling of 28143026 in words is "twenty-eight million, one hundred forty-three thousand, twenty-six".