28945554 has 16 divisors (see below), whose sum is σ = 63154080. Its totient is φ = 8771360.

The previous prime is 28945513. The next prime is 28945573. The reversal of 28945554 is 45554982.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 219219 + ... + 219350.

It is an arithmetic number, because the mean of its divisors is an integer number (3947130).

Almost surely, 2^28945554 is an apocalyptic number.

28945554 is an abundant number, since it is smaller than the sum of its proper divisors (34208526).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28945554 is a wasteful number, since it uses less digits than its factorization.

28945554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438585.

The product of its digits is 288000, while the sum is 42.

The square root of 28945554 is about 5380.1072480017. The cubic root of 28945554 is about 307.0392915860.

It can be divided in two parts, 2894 and 5554, that added together give a palindrome (8448).

The spelling of 28945554 in words is "twenty-eight million, nine hundred forty-five thousand, five hundred fifty-four".