57257789 has 8 divisors (see below), whose sum is σ = 58544640. Its totient is φ = 55981600.

The previous prime is 57257779. The next prime is 57257791. The reversal of 57257789 is 98775275.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57257789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57257749) 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 7 ways as a sum of consecutive naturals, for example, 8729 + ... + 13809.

It is an arithmetic number, because the mean of its divisors is an integer number (7318080).

Almost surely, 2^57257789 is an apocalyptic number.

57257789 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

57257789 is a deficient number, since it is larger than the sum of its proper divisors (1286851).

57257789 is a wasteful number, since it uses less digits than its factorization.

57257789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5331.

The product of its digits is 1234800, while the sum is 50.

The square root of 57257789 is about 7566.8876693129. The cubic root of 57257789 is about 385.4294168554.

The spelling of 57257789 in words is "fifty-seven million, two hundred fifty-seven thousand, seven hundred eighty-nine".