28419433 has 4 divisors (see below), whose sum is σ = 32479360. Its totient is φ = 24359508.

The previous prime is 28419409. The next prime is 28419439. The reversal of 28419433 is 33491482.

28419433 = 802² + 803² + ... + 843².

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33491482 = 2 ⋅16745741.

It is a cyclic number.

It is not a de Polignac number, because 28419433 - 2¹³ = 28411241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28419439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2029953 + ... + 2029966.

It is an arithmetic number, because the mean of its divisors is an integer number (8119840).

Almost surely, 2^28419433 is an apocalyptic number.

It is an amenable number.

28419433 is a deficient number, since it is larger than the sum of its proper divisors (4059927).

28419433 is an equidigital number, since it uses as much as digits as its factorization.

28419433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4059926.

The product of its digits is 20736, while the sum is 34.

The square root of 28419433 is about 5330.9879947342. The cubic root of 28419433 is about 305.1676333707.

The spelling of 28419433 in words is "twenty-eight million, four hundred nineteen thousand, four hundred thirty-three".