57285439 has 2 divisors, whose sum is σ = 57285440. Its totient is φ = 57285438.

The previous prime is 57285413. The next prime is 57285451. The reversal of 57285439 is 93458275.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 57285439 - 2⁷ = 57285311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 57285395 and 57285404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (57285409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28642719 + 28642720.

It is an arithmetic number, because the mean of its divisors is an integer number (28642720).

Almost surely, 2^57285439 is an apocalyptic number.

57285439 is a deficient number, since it is larger than the sum of its proper divisors (1).

57285439 is an equidigital number, since it uses as much as digits as its factorization.

57285439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 57285439 is about 7568.7144879431. The cubic root of 57285439 is about 385.4914486393.

The spelling of 57285439 in words is "fifty-seven million, two hundred eighty-five thousand, four hundred thirty-nine".