57238638 has 16 divisors (see below), whose sum is σ = 116090496. Its totient is φ = 18810680.

The previous prime is 57238631. The next prime is 57238661. The reversal of 57238638 is 83683275.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 57238638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57238631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66756 + ... + 67607.

It is an arithmetic number, because the mean of its divisors is an integer number (7255656).

Almost surely, 2^57238638 is an apocalyptic number.

57238638 is an abundant number, since it is smaller than the sum of its proper divisors (58851858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57238638 is a wasteful number, since it uses less digits than its factorization.

57238638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134439.

The product of its digits is 241920, while the sum is 42.

The square root of 57238638 is about 7565.6221158607. The cubic root of 57238638 is about 385.3864405664.

The spelling of 57238638 in words is "fifty-seven million, two hundred thirty-eight thousand, six hundred thirty-eight".