28555673 has 4 divisors (see below), whose sum is σ = 29797248. Its totient is φ = 27314100.

The previous prime is 28555663. The next prime is 28555679. The reversal of 28555673 is 37655582.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28555673 - 2⁶ = 28555609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28555673.

It is not an unprimeable number, because it can be changed into a prime (28555679) 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, 620753 + ... + 620798.

It is an arithmetic number, because the mean of its divisors is an integer number (7449312).

Almost surely, 2^28555673 is an apocalyptic number.

28555673 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28555673 is a deficient number, since it is larger than the sum of its proper divisors (1241575).

28555673 is a wasteful number, since it uses less digits than its factorization.

28555673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241574.

The product of its digits is 252000, while the sum is 41.

The square root of 28555673 is about 5343.7508362572. The cubic root of 28555673 is about 305.6545041864.

Subtracting 28555673 from its reverse (37655582), we obtain a palindrome (9099909).

The spelling of 28555673 in words is "twenty-eight million, five hundred fifty-five thousand, six hundred seventy-three".