28700517 has 8 divisors (see below), whose sum is σ = 39587040. Its totient is φ = 18473840.

The previous prime is 28700489. The next prime is 28700521. The reversal of 28700517 is 71500782.

It is a happy number.

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 28700517 - 2¹⁶ = 28634981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28700537) 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, 164859 + ... + 165032.

It is an arithmetic number, because the mean of its divisors is an integer number (4948380).

Almost surely, 2^28700517 is an apocalyptic number.

It is an amenable number.

28700517 is a deficient number, since it is larger than the sum of its proper divisors (10886523).

28700517 is a wasteful number, since it uses less digits than its factorization.

28700517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329923.

The product of its (nonzero) digits is 3920, while the sum is 30.

The square root of 28700517 is about 5357.2863466498. The cubic root of 28700517 is about 306.1704270842.

The spelling of 28700517 in words is "twenty-eight million, seven hundred thousand, five hundred seventeen".