57742391 has 8 divisors (see below), whose sum is σ = 67601184. Its totient is φ = 48286080.

The previous prime is 57742381. The next prime is 57742453. The reversal of 57742391 is 19324775.

57742391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-57742391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57742331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100310 + ... + 100883.

It is an arithmetic number, because the mean of its divisors is an integer number (8450148).

Almost surely, 2^57742391 is an apocalyptic number.

57742391 is a deficient number, since it is larger than the sum of its proper divisors (9858793).

57742391 is a wasteful number, since it uses less digits than its factorization.

57742391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201241.

The product of its digits is 52920, while the sum is 38.

The square root of 57742391 is about 7598.8414248489. The cubic root of 57742391 is about 386.5137257641.

The spelling of 57742391 in words is "fifty-seven million, seven hundred forty-two thousand, three hundred ninety-one".