57243638 has 4 divisors (see below), whose sum is σ = 85865460. Its totient is φ = 28621818.

The previous prime is 57243623. The next prime is 57243649. The reversal of 57243638 is 83634275.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14310908 + ... + 14310911.

It is an arithmetic number, because the mean of its divisors is an integer number (21466365).

Almost surely, 2^57243638 is an apocalyptic number.

57243638 is a deficient number, since it is larger than the sum of its proper divisors (28621822).

57243638 is a wasteful number, since it uses less digits than its factorization.

57243638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28621821.

The product of its digits is 120960, while the sum is 38.

The square root of 57243638 is about 7565.9525507368. The cubic root of 57243638 is about 385.3976618682.

The spelling of 57243638 in words is "fifty-seven million, two hundred forty-three thousand, six hundred thirty-eight".