57287329 has 12 divisors (see below), whose sum is σ = 64163988. Its totient is φ = 51091040.

The previous prime is 57287281. The next prime is 57287341. The reversal of 57287329 is 92378275.

It can be written as a sum of positive squares in 2 ways, for example, as 27878400 + 29408929 = 5280^2 + 5423^2 .

It is not a de Polignac number, because 57287329 - 2¹⁷ = 57156257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57287369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1947 + ... + 10879.

It is an arithmetic number, because the mean of its divisors is an integer number (5346999).

Almost surely, 2^57287329 is an apocalyptic number.

It is an amenable number.

57287329 is a deficient number, since it is larger than the sum of its proper divisors (6876659).

57287329 is a wasteful number, since it uses less digits than its factorization.

57287329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9008 (or 8997 counting only the distinct ones).

The product of its digits is 211680, while the sum is 43.

The square root of 57287329 is about 7568.8393429904. The cubic root of 57287329 is about 385.4956880576.

The spelling of 57287329 in words is "fifty-seven million, two hundred eighty-seven thousand, three hundred twenty-nine".