57148786 has 4 divisors (see below), whose sum is σ = 85723182. Its totient is φ = 28574392.

The previous prime is 57148783. The next prime is 57148799. The reversal of 57148786 is 68784175.

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

It can be written as a sum of positive squares in only one way, i.e., 53655625 + 3493161 = 7325^2 + 1869^2 .

It is not an unprimeable number, because it can be changed into a prime (57148783) 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 as a sum of consecutive naturals, namely, 14287195 + ... + 14287198.

Almost surely, 2^57148786 is an apocalyptic number.

57148786 is a deficient number, since it is larger than the sum of its proper divisors (28574396).

57148786 is a wasteful number, since it uses less digits than its factorization.

57148786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28574395.

The product of its digits is 376320, while the sum is 46.

The square root of 57148786 is about 7559.6816070520. The cubic root of 57148786 is about 385.1846778015.

The spelling of 57148786 in words is "fifty-seven million, one hundred forty-eight thousand, seven hundred eighty-six".