28795521 has 8 divisors (see below), whose sum is σ = 39718080. Its totient is φ = 18534992.

The previous prime is 28795493. The next prime is 28795531. The reversal of 28795521 is 12559782.

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 28795521 - 2⁶ = 28795457 is a prime.

It is a super-2 number, since 2×28795521² = 1658364059322882, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 28795521.

It is not an unprimeable number, because it can be changed into a prime (28795531) 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, 165405 + ... + 165578.

It is an arithmetic number, because the mean of its divisors is an integer number (4964760).

Almost surely, 2^28795521 is an apocalyptic number.

It is an amenable number.

28795521 is a deficient number, since it is larger than the sum of its proper divisors (10922559).

28795521 is a wasteful number, since it uses less digits than its factorization.

28795521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331015.

The product of its digits is 50400, while the sum is 39.

The square root of 28795521 is about 5366.1458235870. The cubic root of 28795521 is about 306.5078818561.

The spelling of 28795521 in words is "twenty-eight million, seven hundred ninety-five thousand, five hundred twenty-one".