16728225 has 24 divisors (see below), whose sum is σ = 28078560. Its totient is φ = 8785920.

The previous prime is 16728209. The next prime is 16728241. The reversal of 16728225 is 52282761.

16728225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (16728209) and next prime (16728241).

It is not a de Polignac number, because 16728225 - 2⁴ = 16728209 is a prime.

It is a congruent number.

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, 3361 + ... + 6689.

It is an arithmetic number, because the mean of its divisors is an integer number (1169940).

Almost surely, 2^16728225 is an apocalyptic number.

16728225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

16728225 is a deficient number, since it is larger than the sum of its proper divisors (11350335).

16728225 is a wasteful number, since it uses less digits than its factorization.

16728225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3409 (or 3404 counting only the distinct ones).

The product of its digits is 13440, while the sum is 33.

The square root of 16728225 is about 4090.0152811450. The cubic root of 16728225 is about 255.7505759503.

The spelling of 16728225 in words is "sixteen million, seven hundred twenty-eight thousand, two hundred twenty-five".