11728457 has 8 divisors (see below), whose sum is σ = 12680136. Its totient is φ = 10783872.

The previous prime is 11728439. The next prime is 11728523. The reversal of 11728457 is 75482711.

It can be written as a sum of positive squares in 4 ways, for example, as 546121 + 11182336 = 739^2 + 3344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11728457 - 2⁶ = 11728393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11728957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1973 + ... + 5229.

It is an arithmetic number, because the mean of its divisors is an integer number (1585017).

Almost surely, 2^11728457 is an apocalyptic number.

It is an amenable number.

11728457 is a deficient number, since it is larger than the sum of its proper divisors (951679).

11728457 is a wasteful number, since it uses less digits than its factorization.

11728457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3547.

The product of its digits is 15680, while the sum is 35.

The square root of 11728457 is about 3424.6834890249. The cubic root of 11728457 is about 227.2027724919.

The spelling of 11728457 in words is "eleven million, seven hundred twenty-eight thousand, four hundred fifty-seven".