28813055 has 4 divisors (see below), whose sum is σ = 34575672. Its totient is φ = 23050440.

The previous prime is 28813049. The next prime is 28813061. The reversal of 28813055 is 55031882.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (28813049) and next prime (28813061).

It is not a de Polignac number, because 28813055 - 2⁸ = 28812799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2881301 + ... + 2881310.

It is an arithmetic number, because the mean of its divisors is an integer number (8643918).

Almost surely, 2^28813055 is an apocalyptic number.

28813055 is a deficient number, since it is larger than the sum of its proper divisors (5762617).

28813055 is an equidigital number, since it uses as much as digits as its factorization.

28813055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5762616.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 28813055 is about 5367.7793360011. The cubic root of 28813055 is about 306.5700815611.

The spelling of 28813055 in words is "twenty-eight million, eight hundred thirteen thousand, fifty-five".