57438911 has 4 divisors (see below), whose sum is σ = 58991352. Its totient is φ = 55886472.

The previous prime is 57438907. The next prime is 57438973. The reversal of 57438911 is 11983475.

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

It is a cyclic number.

It is not a de Polignac number, because 57438911 - 2² = 57438907 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 (57438811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 776165 + ... + 776238.

It is an arithmetic number, because the mean of its divisors is an integer number (14747838).

Almost surely, 2^57438911 is an apocalyptic number.

57438911 is a deficient number, since it is larger than the sum of its proper divisors (1552441).

57438911 is a wasteful number, since it uses less digits than its factorization.

57438911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552440.

The product of its digits is 30240, while the sum is 38.

The square root of 57438911 is about 7578.8462842309. The cubic root of 57438911 is about 385.8353951980.

The spelling of 57438911 in words is "fifty-seven million, four hundred thirty-eight thousand, nine hundred eleven".