57128833 has 4 divisors (see below), whose sum is σ = 57770820. Its totient is φ = 56486848.

The previous prime is 57128807. The next prime is 57128843. The reversal of 57128833 is 33882175.

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

It can be written as a sum of positive squares in 2 ways, for example, as 34963569 + 22165264 = 5913^2 + 4708^2 .

It is a cyclic number.

It is not a de Polignac number, because 57128833 - 2¹⁷ = 56997761 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 57128792 and 57128801.

It is not an unprimeable number, because it can be changed into a prime (57128843) 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, 320860 + ... + 321037.

It is an arithmetic number, because the mean of its divisors is an integer number (14442705).

Almost surely, 2^57128833 is an apocalyptic number.

It is an amenable number.

57128833 is a deficient number, since it is larger than the sum of its proper divisors (641987).

57128833 is an equidigital number, since it uses as much as digits as its factorization.

57128833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641986.

The product of its digits is 40320, while the sum is 37.

The square root of 57128833 is about 7558.3617934047. The cubic root of 57128833 is about 385.1398446269.

The spelling of 57128833 in words is "fifty-seven million, one hundred twenty-eight thousand, eight hundred thirty-three".