28512434 has 8 divisors (see below), whose sum is σ = 45284508. Its totient is φ = 13417600.

The previous prime is 28512431. The next prime is 28512439. The reversal of 28512434 is 43421582.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 28121809 + 390625 = 5303^2 + 625^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 28512397 and 28512406.

It is not an unprimeable number, because it can be changed into a prime (28512431) by changing a digit.

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, 419267 + ... + 419334.

Almost surely, 2^28512434 is an apocalyptic number.

28512434 is a deficient number, since it is larger than the sum of its proper divisors (16772074).

28512434 is a wasteful number, since it uses less digits than its factorization.

28512434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838620.

The product of its digits is 7680, while the sum is 29.

The square root of 28512434 is about 5339.7035498237. The cubic root of 28512434 is about 305.5001522371.

The spelling of 28512434 in words is "twenty-eight million, five hundred twelve thousand, four hundred thirty-four".