28643074 has 16 divisors (see below), whose sum is σ = 44161920. Its totient is φ = 13925520.

The previous prime is 28643053. The next prime is 28643077. The reversal of 28643074 is 47034682.

It is not an unprimeable number, because it can be changed into a prime (28643077) 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 7 ways as a sum of consecutive naturals, for example, 22692 + ... + 23920.

It is an arithmetic number, because the mean of its divisors is an integer number (2760120).

Almost surely, 2^28643074 is an apocalyptic number.

28643074 is a deficient number, since it is larger than the sum of its proper divisors (15518846).

28643074 is a wasteful number, since it uses less digits than its factorization.

28643074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1545.

The product of its (nonzero) digits is 32256, while the sum is 34.

The square root of 28643074 is about 5351.9224583321. The cubic root of 28643074 is about 305.9660278118.

The spelling of 28643074 in words is "twenty-eight million, six hundred forty-three thousand, seventy-four".