28932225 has 24 divisors (see below), whose sum is σ = 54669120. Its totient is φ = 13225920.

The previous prime is 28932191. The next prime is 28932247. The reversal of 28932225 is 52223982.

It is not a de Polignac number, because 28932225 - 2⁶ = 28932161 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27030 + ... + 28079.

It is an arithmetic number, because the mean of its divisors is an integer number (2277880).

Almost surely, 2^28932225 is an apocalyptic number.

28932225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28932225 is a deficient number, since it is larger than the sum of its proper divisors (25736895).

28932225 is a wasteful number, since it uses less digits than its factorization.

28932225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55129 (or 55124 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 28932225 is about 5378.8683754113. The cubic root of 28932225 is about 306.9921553308.

The spelling of 28932225 in words is "twenty-eight million, nine hundred thirty-two thousand, two hundred twenty-five".