28340434 has 8 divisors (see below), whose sum is σ = 42645708. Its totient is φ = 14125200.

The previous prime is 28340423. The next prime is 28340467. The reversal of 28340434 is 43404382.

It can be written as a sum of positive squares in 2 ways, for example, as 17614809 + 10725625 = 4197^2 + 3275^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21717 + ... + 22984.

Almost surely, 2^28340434 is an apocalyptic number.

28340434 is a deficient number, since it is larger than the sum of its proper divisors (14305274).

28340434 is a wasteful number, since it uses less digits than its factorization.

28340434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45020.

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 28340434 is about 5323.5734239325. The cubic root of 28340434 is about 304.8846074278.

The spelling of 28340434 in words is "twenty-eight million, three hundred forty thousand, four hundred thirty-four".