28802017 has 8 divisors (see below), whose sum is σ = 29932200. Its totient is φ = 27681024.

The previous prime is 28801979. The next prime is 28802071. The reversal of 28802017 is 71020882.

It can be written as a sum of positive squares in 4 ways, for example, as 2954961 + 25847056 = 1719^2 + 5084^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 28802017 - 2⁷ = 28801889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28802087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4473 + ... + 8809.

It is an arithmetic number, because the mean of its divisors is an integer number (3741525).

Almost surely, 2^28802017 is an apocalyptic number.

It is an amenable number.

28802017 is a deficient number, since it is larger than the sum of its proper divisors (1130183).

28802017 is a wasteful number, since it uses less digits than its factorization.

28802017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4595.

The product of its (nonzero) digits is 1792, while the sum is 28.

The square root of 28802017 is about 5366.7510655889. The cubic root of 28802017 is about 306.5309285595.

Adding to 28802017 its reverse (71020882), we get a palindrome (99822899).

The spelling of 28802017 in words is "twenty-eight million, eight hundred two thousand, seventeen".