28459505 has 8 divisors (see below), whose sum is σ = 34180224. Its totient is φ = 22748400.

The previous prime is 28459451. The next prime is 28459517. The reversal of 28459505 is 50595482.

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

It is not a de Polignac number, because 28459505 - 2¹⁰ = 28458481 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9320 + ... + 11990.

It is an arithmetic number, because the mean of its divisors is an integer number (4272528).

Almost surely, 2^28459505 is an apocalyptic number.

It is an amenable number.

28459505 is a deficient number, since it is larger than the sum of its proper divisors (5720719).

28459505 is a wasteful number, since it uses less digits than its factorization.

28459505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4807.

The product of its (nonzero) digits is 72000, while the sum is 38.

The square root of 28459505 is about 5334.7450735719. The cubic root of 28459505 is about 305.3109969433.

The spelling of 28459505 in words is "twenty-eight million, four hundred fifty-nine thousand, five hundred five".