57438709 has 4 divisors (see below), whose sum is σ = 57535200. Its totient is φ = 57342220.

The previous prime is 57438707. The next prime is 57438737. The reversal of 57438709 is 90783475.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57438709 - 2¹ = 57438707 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 (57438707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47347 + ... + 48544.

It is an arithmetic number, because the mean of its divisors is an integer number (14383800).

Almost surely, 2^57438709 is an apocalyptic number.

It is an amenable number.

57438709 is a deficient number, since it is larger than the sum of its proper divisors (96491).

57438709 is an equidigital number, since it uses as much as digits as its factorization.

57438709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96490.

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 57438709 is about 7578.8329576525. The cubic root of 57438709 is about 385.8349428981.

The spelling of 57438709 in words is "fifty-seven million, four hundred thirty-eight thousand, seven hundred nine".