28922145 has 16 divisors (see below), whose sum is σ = 52886400. Its totient is φ = 13221504.

The previous prime is 28922143. The next prime is 28922149. The reversal of 28922145 is 54122982.

It is not a de Polignac number, because 28922145 - 2¹ = 28922143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28922143) 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 15 ways as a sum of consecutive naturals, for example, 137620 + ... + 137829.

It is an arithmetic number, because the mean of its divisors is an integer number (3305400).

Almost surely, 2^28922145 is an apocalyptic number.

It is an amenable number.

28922145 is a deficient number, since it is larger than the sum of its proper divisors (23964255).

28922145 is a wasteful number, since it uses less digits than its factorization.

28922145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275464.

The product of its digits is 11520, while the sum is 33.

The square root of 28922145 is about 5377.9312937225. The cubic root of 28922145 is about 306.9564991220.

The spelling of 28922145 in words is "twenty-eight million, nine hundred twenty-two thousand, one hundred forty-five".