28003017 has 16 divisors (see below), whose sum is σ = 44917760. Its totient is φ = 15159312.

The previous prime is 28003007. The next prime is 28003021. The reversal of 28003017 is 71030082.

It is not a de Polignac number, because 28003017 - 2¹⁰ = 28001993 is a prime.

It is a super-2 number, since 2×28003017² = 1568337922204578, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28002984 and 28003002.

It is not an unprimeable number, because it can be changed into a prime (28003007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34693 + ... + 35490.

It is an arithmetic number, because the mean of its divisors is an integer number (2807360).

Almost surely, 2^28003017 is an apocalyptic number.

It is an amenable number.

28003017 is a deficient number, since it is larger than the sum of its proper divisors (16914743).

28003017 is a wasteful number, since it uses less digits than its factorization.

28003017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70212.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 28003017 is about 5291.7876941540. The cubic root of 28003017 is about 303.6698032113.

Adding to 28003017 its reverse (71030082), we get a palindrome (99033099).

The spelling of 28003017 in words is "twenty-eight million, three thousand, seventeen".