57028393 has 2 divisors, whose sum is σ = 57028394. Its totient is φ = 57028392.

The previous prime is 57028379. The next prime is 57028399. The reversal of 57028393 is 39382075.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44729344 + 12299049 = 6688^2 + 3507^2 .

It is a cyclic number.

It is not a de Polignac number, because 57028393 - 2⁹ = 57027881 is a prime.

It is not a weakly prime, because it can be changed into another prime (57028399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28514196 + 28514197.

It is an arithmetic number, because the mean of its divisors is an integer number (28514197).

Almost surely, 2^57028393 is an apocalyptic number.

It is an amenable number.

57028393 is a deficient number, since it is larger than the sum of its proper divisors (1).

57028393 is an equidigital number, since it uses as much as digits as its factorization.

57028393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 57028393 is about 7551.7145735257. The cubic root of 57028393 is about 384.9140033933.

The spelling of 57028393 in words is "fifty-seven million, twenty-eight thousand, three hundred ninety-three".