28543429 has 4 divisors (see below), whose sum is σ = 29150784. Its totient is φ = 27936076.

The previous prime is 28543399. The next prime is 28543439. The reversal of 28543429 is 92434582.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28543429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28543439) 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, 303607 + ... + 303700.

It is an arithmetic number, because the mean of its divisors is an integer number (7287696).

Almost surely, 2^28543429 is an apocalyptic number.

It is an amenable number.

28543429 is a deficient number, since it is larger than the sum of its proper divisors (607355).

28543429 is an equidigital number, since it uses as much as digits as its factorization.

28543429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607354.

The product of its digits is 69120, while the sum is 37.

The square root of 28543429 is about 5342.6050761777. The cubic root of 28543429 is about 305.6108121237.

The spelling of 28543429 in words is "twenty-eight million, five hundred forty-three thousand, four hundred twenty-nine".