28439335 has 4 divisors (see below), whose sum is σ = 34127208. Its totient is φ = 22751464.

The previous prime is 28439329. The next prime is 28439353. The reversal of 28439335 is 53393482.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53393482 = 2 ⋅26696741.

It is a cyclic number.

It is not a de Polignac number, because 28439335 - 2⁵ = 28439303 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28439294 and 28439303.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2843929 + ... + 2843938.

It is an arithmetic number, because the mean of its divisors is an integer number (8531802).

Almost surely, 2^28439335 is an apocalyptic number.

28439335 is a deficient number, since it is larger than the sum of its proper divisors (5687873).

28439335 is an equidigital number, since it uses as much as digits as its factorization.

28439335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5687872.

The product of its digits is 77760, while the sum is 37.

The square root of 28439335 is about 5332.8543014037. The cubic root of 28439335 is about 305.2388525848.

The spelling of 28439335 in words is "twenty-eight million, four hundred thirty-nine thousand, three hundred thirty-five".