28046155 has 4 divisors (see below), whose sum is σ = 33655392. Its totient is φ = 22436920.

The previous prime is 28046143. The next prime is 28046159. The reversal of 28046155 is 55164082.

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

It is not a de Polignac number, because 28046155 - 2¹⁵ = 28013387 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28046159) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2804611 + ... + 2804620.

It is an arithmetic number, because the mean of its divisors is an integer number (8413848).

Almost surely, 2^28046155 is an apocalyptic number.

28046155 is a deficient number, since it is larger than the sum of its proper divisors (5609237).

28046155 is an equidigital number, since it uses as much as digits as its factorization.

28046155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5609236.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 28046155 is about 5295.8620639137. The cubic root of 28046155 is about 303.8256553125.

The spelling of 28046155 in words is "twenty-eight million, forty-six thousand, one hundred fifty-five".