28551017 has 16 divisors (see below), whose sum is σ = 31933440. Its totient is φ = 25309200.

The previous prime is 28551001. The next prime is 28551023. The reversal of 28551017 is 71015582.

It is a cyclic number.

It is not a de Polignac number, because 28551017 - 2⁴ = 28551001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28551617) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108428 + ... + 108690.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^28551017 is an apocalyptic number.

It is an amenable number.

28551017 is a deficient number, since it is larger than the sum of its proper divisors (3382423).

28551017 is a wasteful number, since it uses less digits than its factorization.

28551017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 28551017 is about 5343.3151694430. The cubic root of 28551017 is about 305.6378909700.

Adding to 28551017 its reverse (71015582), we get a palindrome (99566599).

The spelling of 28551017 in words is "twenty-eight million, five hundred fifty-one thousand, seventeen".