28019017 has 12 divisors (see below), whose sum is σ = 31391820. Its totient is φ = 24967488.

The previous prime is 28019011. The next prime is 28019023. The reversal of 28019017 is 71091082.

It is an interprime number because it is at equal distance from previous prime (28019011) and next prime (28019023).

It can be written as a sum of positive squares in 6 ways, for example, as 3059001 + 24960016 = 1749^2 + 4996^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28019017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28019011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2043 + ... + 7759.

It is an arithmetic number, because the mean of its divisors is an integer number (2615985).

Almost surely, 2^28019017 is an apocalyptic number.

It is an amenable number.

28019017 is a deficient number, since it is larger than the sum of its proper divisors (3372803).

28019017 is a wasteful number, since it uses less digits than its factorization.

28019017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772 (or 5759 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 28019017 is about 5293.2992547182. The cubic root of 28019017 is about 303.7276278351.

The spelling of 28019017 in words is "twenty-eight million, nineteen thousand, seventeen".