28528517 has 8 divisors (see below), whose sum is σ = 29366400. Its totient is φ = 27694224.

The previous prime is 28528501. The next prime is 28528529. The reversal of 28528517 is 71582582.

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 28528517 - 2⁴ = 28528501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28528537) 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, 30584 + ... + 31502.

It is an arithmetic number, because the mean of its divisors is an integer number (3670800).

Almost surely, 2^28528517 is an apocalyptic number.

It is an amenable number.

28528517 is a deficient number, since it is larger than the sum of its proper divisors (837883).

28528517 is an equidigital number, since it uses as much as digits as its factorization.

28528517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795.

The product of its digits is 44800, while the sum is 38.

The square root of 28528517 is about 5341.2093199949. The cubic root of 28528517 is about 305.5575825663.

The spelling of 28528517 in words is "twenty-eight million, five hundred twenty-eight thousand, five hundred seventeen".