28784435 has 4 divisors (see below), whose sum is σ = 34541328. Its totient is φ = 23027544.

The previous prime is 28784407. The next prime is 28784447. The reversal of 28784435 is 53448782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28784435 - 2²⁰ = 27735859 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28784392 and 28784401.

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, 2878439 + ... + 2878448.

It is an arithmetic number, because the mean of its divisors is an integer number (8635332).

Almost surely, 2^28784435 is an apocalyptic number.

28784435 is a deficient number, since it is larger than the sum of its proper divisors (5756893).

28784435 is an equidigital number, since it uses as much as digits as its factorization.

28784435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5756892.

The product of its digits is 215040, while the sum is 41.

The square root of 28784435 is about 5365.1127667552. The cubic root of 28784435 is about 306.4685426068.

The spelling of 28784435 in words is "twenty-eight million, seven hundred eighty-four thousand, four hundred thirty-five".