28623055 has 4 divisors (see below), whose sum is σ = 34347672. Its totient is φ = 22898440.

The previous prime is 28623041. The next prime is 28623059. The reversal of 28623055 is 55032682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55032682 = 2 ⋅27516341.

It is a de Polignac number, because none of the positive numbers 2^k-28623055 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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623059) by changing a digit.

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, 2862301 + ... + 2862310.

It is an arithmetic number, because the mean of its divisors is an integer number (8586918).

Almost surely, 2^28623055 is an apocalyptic number.

28623055 is a deficient number, since it is larger than the sum of its proper divisors (5724617).

28623055 is an equidigital number, since it uses as much as digits as its factorization.

28623055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724616.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 28623055 is about 5350.0518689074. The cubic root of 28623055 is about 305.8947300472.

The spelling of 28623055 in words is "twenty-eight million, six hundred twenty-three thousand, fifty-five".