12728354 has 4 divisors (see below), whose sum is σ = 19092534. Its totient is φ = 6364176.

The previous prime is 12728351. The next prime is 12728363. The reversal of 12728354 is 45382721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11458225 + 1270129 = 3385^2 + 1127^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12728354.

It is not an unprimeable number, because it can be changed into a prime (12728351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3182087 + ... + 3182090.

Almost surely, 2^12728354 is an apocalyptic number.

12728354 is a deficient number, since it is larger than the sum of its proper divisors (6364180).

12728354 is an equidigital number, since it uses as much as digits as its factorization.

12728354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6364179.

The product of its digits is 13440, while the sum is 32.

The square root of 12728354 is about 3567.6818804372. The cubic root of 12728354 is about 233.4841560045.

The spelling of 12728354 in words is "twelve million, seven hundred twenty-eight thousand, three hundred fifty-four".