28469225 has 24 divisors (see below), whose sum is σ = 36729792. Its totient is φ = 21873600.

The previous prime is 28469219. The next prime is 28469227. The reversal of 28469225 is 52296482.

It is not a de Polignac number, because 28469225 - 2¹⁰ = 28468201 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28469227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76139 + ... + 76511.

It is an arithmetic number, because the mean of its divisors is an integer number (1530408).

Almost surely, 2^28469225 is an apocalyptic number.

28469225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28469225 is a deficient number, since it is larger than the sum of its proper divisors (8260567).

28469225 is a wasteful number, since it uses less digits than its factorization.

28469225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 492 counting only the distinct ones).

The product of its digits is 69120, while the sum is 38.

The square root of 28469225 is about 5335.6560046540. The cubic root of 28469225 is about 305.3457514140.

The spelling of 28469225 in words is "twenty-eight million, four hundred sixty-nine thousand, two hundred twenty-five".