28028895 has 16 divisors (see below), whose sum is σ = 47207040. Its totient is φ = 14161824.

The previous prime is 28028893. The next prime is 28028899. The reversal of 28028895 is 59882082.

It is not a de Polignac number, because 28028895 - 2¹ = 28028893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28028893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48889 + ... + 49458.

It is an arithmetic number, because the mean of its divisors is an integer number (2950440).

Almost surely, 2^28028895 is an apocalyptic number.

28028895 is a deficient number, since it is larger than the sum of its proper divisors (19178145).

28028895 is a wasteful number, since it uses less digits than its factorization.

28028895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98374.

The product of its (nonzero) digits is 92160, while the sum is 42.

The square root of 28028895 is about 5294.2322389559. The cubic root of 28028895 is about 303.7633163225.

The spelling of 28028895 in words is "twenty-eight million, twenty-eight thousand, eight hundred ninety-five".