28455193 has 4 divisors (see below), whose sum is σ = 30644068. Its totient is φ = 26266320.

The previous prime is 28455187. The next prime is 28455197. The reversal of 28455193 is 39155482.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8277129 + 20178064 = 2877^2 + 4492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28455193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28455197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1094418 + ... + 1094443.

It is an arithmetic number, because the mean of its divisors is an integer number (7661017).

Almost surely, 2^28455193 is an apocalyptic number.

It is an amenable number.

28455193 is a deficient number, since it is larger than the sum of its proper divisors (2188875).

28455193 is a wasteful number, since it uses less digits than its factorization.

28455193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188874.

The product of its digits is 43200, while the sum is 37.

The square root of 28455193 is about 5334.3409152397. The cubic root of 28455193 is about 305.2955765824.

The spelling of 28455193 in words is "twenty-eight million, four hundred fifty-five thousand, one hundred ninety-three".