28364429 has 4 divisors (see below), whose sum is σ = 28764000. Its totient is φ = 27964860.

The previous prime is 28364423. The next prime is 28364431. The reversal of 28364429 is 92446382.

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 not a de Polignac number, because 28364429 - 2⁸ = 28364173 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28364392 and 28364401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28364423) 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, 199679 + ... + 199820.

It is an arithmetic number, because the mean of its divisors is an integer number (7191000).

Almost surely, 2^28364429 is an apocalyptic number.

It is an amenable number.

28364429 is a deficient number, since it is larger than the sum of its proper divisors (399571).

28364429 is an equidigital number, since it uses as much as digits as its factorization.

28364429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399570.

The product of its digits is 82944, while the sum is 38.

The square root of 28364429 is about 5325.8266025097. The cubic root of 28364429 is about 304.9706287223.

The spelling of 28364429 in words is "twenty-eight million, three hundred sixty-four thousand, four hundred twenty-nine".