28003434 has 32 divisors (see below), whose sum is σ = 57193344. Its totient is φ = 9139200.

The previous prime is 28003433. The next prime is 28003439. The reversal of 28003434 is 43430082.

It is not an unprimeable number, because it can be changed into a prime (28003433) 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 15 ways as a sum of consecutive naturals, for example, 69634 + ... + 70034.

It is an arithmetic number, because the mean of its divisors is an integer number (1787292).

Almost surely, 2^28003434 is an apocalyptic number.

28003434 is an abundant number, since it is smaller than the sum of its proper divisors (29189910).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28003434 is a wasteful number, since it uses less digits than its factorization.

28003434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 28003434 is about 5291.8270946810. The cubic root of 28003434 is about 303.6713105450.

The spelling of 28003434 in words is "twenty-eight million, three thousand, four hundred thirty-four".