28012017 has 8 divisors (see below), whose sum is σ = 40744800. Its totient is φ = 16976960.

The previous prime is 28011989. The next prime is 28012031. The reversal of 28012017 is 71021082.

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

It is not a de Polignac number, because 28012017 - 2⁸ = 28011761 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28011984 and 28012002.

It is not an unprimeable number, because it can be changed into a prime (28012067) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 424392 + ... + 424457.

It is an arithmetic number, because the mean of its divisors is an integer number (5093100).

Almost surely, 2^28012017 is an apocalyptic number.

It is an amenable number.

28012017 is a deficient number, since it is larger than the sum of its proper divisors (12732783).

28012017 is a wasteful number, since it uses less digits than its factorization.

28012017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848863.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 28012017 is about 5292.6380000903. The cubic root of 28012017 is about 303.7023322716.

Adding to 28012017 its reverse (71021082), we get a palindrome (99033099).

The spelling of 28012017 in words is "twenty-eight million, twelve thousand, seventeen".