28898017 has 4 divisors (see below), whose sum is σ = 28929796. Its totient is φ = 28866240.

The previous prime is 28897991. The next prime is 28898029. The reversal of 28898017 is 71089882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11182336 + 17715681 = 3344^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 28898017 - 2¹⁹ = 28373729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28898047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14484 + ... + 16357.

It is an arithmetic number, because the mean of its divisors is an integer number (7232449).

Almost surely, 2^28898017 is an apocalyptic number.

It is an amenable number.

28898017 is a deficient number, since it is larger than the sum of its proper divisors (31779).

28898017 is an equidigital number, since it uses as much as digits as its factorization.

28898017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31778.

The product of its (nonzero) digits is 64512, while the sum is 43.

The square root of 28898017 is about 5375.6875839282. The cubic root of 28898017 is about 306.8711169475.

The spelling of 28898017 in words is "twenty-eight million, eight hundred ninety-eight thousand, seventeen".