28378834 has 16 divisors (see below), whose sum is σ = 46552320. Its totient is φ = 12867760.

The previous prime is 28378829. The next prime is 28378841. The reversal of 28378834 is 43887382.

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 7 ways as a sum of consecutive naturals, for example, 9192 + ... + 11884.

It is an arithmetic number, because the mean of its divisors is an integer number (2909520).

Almost surely, 2^28378834 is an apocalyptic number.

28378834 is a deficient number, since it is larger than the sum of its proper divisors (18173486).

28378834 is a wasteful number, since it uses less digits than its factorization.

28378834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185.

The product of its digits is 258048, while the sum is 43.

The square root of 28378834 is about 5327.1788030814. The cubic root of 28378834 is about 305.0222468768.

The spelling of 28378834 in words is "twenty-eight million, three hundred seventy-eight thousand, eight hundred thirty-four".