28350155 has 4 divisors (see below), whose sum is σ = 34020192. Its totient is φ = 22680120.

The previous prime is 28350143. The next prime is 28350173. The reversal of 28350155 is 55105382.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-28350155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2835011 + ... + 2835020.

It is an arithmetic number, because the mean of its divisors is an integer number (8505048).

Almost surely, 2^28350155 is an apocalyptic number.

28350155 is a deficient number, since it is larger than the sum of its proper divisors (5670037).

28350155 is an equidigital number, since it uses as much as digits as its factorization.

28350155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5670036.

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 28350155 is about 5324.4863602041. The cubic root of 28350155 is about 304.9194627452.

The spelling of 28350155 in words is "twenty-eight million, three hundred fifty thousand, one hundred fifty-five".