1056728449 has 16 divisors (see below), whose sum is σ = 1279756800. Its totient is φ = 851802624.

The previous prime is 1056728447. The next prime is 1056728459. The reversal of 1056728449 is 9448276501.

It is a cyclic number.

It is not a de Polignac number, because 1056728449 - 2¹ = 1056728447 is a prime.

It is a super-2 number, since 2×1056728449² = 2233350029851891202, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1056728399 and 1056728408.

It is not an unprimeable number, because it can be changed into a prime (1056728441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188712 + ... + 194230.

It is an arithmetic number, because the mean of its divisors is an integer number (79984800).

Almost surely, 2^1056728449 is an apocalyptic number.

It is an amenable number.

1056728449 is a deficient number, since it is larger than the sum of its proper divisors (223028351).

1056728449 is a wasteful number, since it uses less digits than its factorization.

1056728449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7152.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 1056728449 is about 32507.3599204857. The cubic root of 1056728449 is about 1018.5627743107.

The spelling of 1056728449 in words is "one billion, fifty-six million, seven hundred twenty-eight thousand, four hundred forty-nine".