11428447 has 4 divisors (see below), whose sum is σ = 11925360. Its totient is φ = 10931536.

The previous prime is 11428433. The next prime is 11428451. The reversal of 11428447 is 74482411.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11428447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11428427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248422 + ... + 248467.

It is an arithmetic number, because the mean of its divisors is an integer number (2981340).

Almost surely, 2^11428447 is an apocalyptic number.

11428447 is a deficient number, since it is larger than the sum of its proper divisors (496913).

11428447 is an equidigital number, since it uses as much as digits as its factorization.

11428447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496912.

The product of its digits is 7168, while the sum is 31.

The square root of 11428447 is about 3380.5986156301. The cubic root of 11428447 is about 225.2487586175.

It can be divided in two parts, 114 and 28447, that added together give a 4-th power (28561 = 13⁴).

The spelling of 11428447 in words is "eleven million, four hundred twenty-eight thousand, four hundred forty-seven".